(window.webpackJsonp=window.webpackJsonp||[]).push([[1808],{2216:function(t,s,a){"use strict";a.r(s);var n=a(31),e=Object(n.a)({},(function(){var t=this,s=t.$createElement,a=t._self._c||s;return a("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[a("h1",{attrs:{id:"append"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#append"}},[t._v("#")]),t._v(" Append")]),t._v(" "),a("h2",{attrs:{id:"efficient-consecutive-append-usage"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#efficient-consecutive-append-usage"}},[t._v("#")]),t._v(" Efficient consecutive .append() usage")]),t._v(" "),a("p",[t._v("Starting out:")]),t._v(" "),a("h3",{attrs:{id:"html"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#html"}},[t._v("#")]),t._v(" HTML")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("table id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'my-table'")]),t._v(" width"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'960'")]),t._v(" height"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'500'")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("table"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n")])])]),a("h3",{attrs:{id:"js"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#js"}},[t._v("#")]),t._v(" JS")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" data "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("[")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" type"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Name"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"John Doe"')]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" type"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Birthdate"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"01/01/1970"')]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" type"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Salary"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"$40,000,000"')]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// ...300 more rows...")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" type"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Favorite Flavour"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Sour"')]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[a("strong",[t._v("Appending inside a loop")])]),t._v(" "),a("p",[t._v("You just received a big array of data. Now it's time to loop through and render it on the page.")]),t._v(" "),a("p",[t._v("Your first thought may be to do something like this:")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" i"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// <- the current item number")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" count "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("length"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// <- the total")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// <- for holding a reference to our row object")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Loop over the array")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("for")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("0")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v(" count"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("++")]),t._v("i "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n row "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("[")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Put the whole row into your table")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#my-table'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'
'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n")])])]),a("p",[t._v("This is "),a("strong",[t._v("perfectly valid")]),t._v(" and will render exactly what you'd expect, but...")]),t._v(" "),a("h3",{attrs:{id:"do-not-do-this"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#do-not-do-this"}},[t._v("#")]),t._v(" DO NOT do this.")]),t._v(" "),a("p",[t._v("Remember those "),a("strong",[t._v("300+")]),t._v(" rows of data?")]),t._v(" "),a("p",[a("strong",[t._v("Each one")]),t._v(" will force the browser to re-calculate every element's width, height and positioning values, along with any other styles - unless they are separated by a "),a("a",{attrs:{href:"http://wilsonpage.co.uk/introducing-layout-boundaries/",target:"_blank",rel:"noopener noreferrer"}},[t._v("layout boundary"),a("OutboundLink")],1),t._v(", which unfortunately for this example (as they are descendants of a "),a("code",[t._v("")]),t._v(" element), they cannot.")]),t._v(" "),a("p",[t._v("At small amounts and few columns, this performance penalty will certainly be negligible. But we want every millisecond to count.")]),t._v(" "),a("p",[a("strong",[t._v("Better options")])]),t._v(" "),a("li",[a("h3",[t._v("Add to a separate array, append after loop completes")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("/** \n * Repeated DOM traversal (following the tree of elements down until you reach\n * what you're looking for - like our ) should also be avoided wherever possible.\n */")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Keep the table cached in a variable then use it until you think it's been removed")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $myTable "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#my-table'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// To hold our new jQuery objects")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowElements "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("[")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" count "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("length"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" i"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Loop over the array")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("for")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("0")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v(" count"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("++")]),t._v("i "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n rowElements"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("push")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'
'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Finally, insert ALL rows at once")]),t._v("\n$myTable"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("rowElements"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("Out of these options, this one relies on jQuery the most.")]),t._v(" "),a("li",[a("h3",[t._v("Using modern Array.* methods")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $myTable "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#my-table'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Looping with the .map() method")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// - This will give us a brand new array based on the result of our callback function")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowElements "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("map")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("row")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Create a row")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $row "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'
'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Create the columns")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $type "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $content "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("html")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Add the columns to the row")]),t._v("\n $row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("$type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" $content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n \n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Add to the newly-generated array")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" $row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Finally, put ALL of the rows into your table")]),t._v("\n$myTable"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("rowElements"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("Functionally equivalent to the one before it, only easier to read.")]),t._v(" "),a("li",[a("h3",[t._v("Using strings of HTML (instead of jQuery built-in methods)")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// ...")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowElements "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("map")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("row")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowHTML "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'| '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n rowHTML "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n rowHTML "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' | '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n rowHTML "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n rowHTML "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' |
'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" rowHTML"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Using .join('') here combines all the separate strings into one")]),t._v("\n$myTable"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("rowElements"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("join")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("''")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[a("strong",[t._v("Perfectly valid")]),t._v(" but again, "),a("strong",[t._v("not recommended")]),t._v(". This forces jQuery to parse a very large amount of text at once and is not necessary. jQuery is very good at what it does when used correctly.")]),t._v(" "),a("li",[a("h3",[t._v("Manually create elements, append to document fragment")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" $myTable "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("getElementById")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'my-table'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("/**\n * Create a document fragment to hold our columns\n * - after appending this to each row, it empties itself\n * so we can re-use it in the next iteration.\n */")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" colFragment "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createDocumentFragment")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("/**\n * Loop over the array using .reduce() this time. \n * We get a nice, tidy output without any side-effects.\n * - In this example, the result will be a \n * document fragment holding all the elements.\n */")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowFragment "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" data"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("reduce")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token parameter"}},[t._v("fragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" row")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Create a row")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" rowEl "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'tr'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Create the columns and the inner text nodes")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" typeEl "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'td'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" typeText "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createTextNode")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("type"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n typeEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("typeText"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" contentEl "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createElement")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'td'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("var")]),t._v(" contentText "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createTextNode")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("row"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("content"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n contentEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("contentText"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Add the columns to the column fragment")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// - this would be useful if columns were iterated over separately")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// but in this example it's just for show and tell.")]),t._v("\n colFragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("typeEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n colFragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("contentEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n \n rowEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("colFragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Add rowEl to fragment - this acts as a temporary buffer to ")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// accumulate multiple DOM nodes before bulk insertion")]),t._v("\n fragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendChild")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("rowEl"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" fragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" document"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("createDocumentFragment")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// Now dump the whole fragment into your table")]),t._v("\n$myTable"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("rowFragment"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[a("strong",[t._v("My personal favorite")]),t._v(". This illustrates a general idea of what jQuery does at a lower level.")]),t._v(" "),a("h3",{attrs:{id:"dive-deeper"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#dive-deeper"}},[t._v("#")]),t._v(" Dive deeper")]),t._v(" "),a("ul",[a("li",[a("a",{attrs:{href:"http://james.padolsey.com/jquery/#v=2.1.3",target:"_blank",rel:"noopener noreferrer"}},[t._v("jQuery source viewer"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join",target:"_blank",rel:"noopener noreferrer"}},[t._v("Array.prototype.join()"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map",target:"_blank",rel:"noopener noreferrer"}},[t._v("Array.prototype.map()"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce",target:"_blank",rel:"noopener noreferrer"}},[t._v("Array.prototype.reduce()"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/API/Document/createDocumentFragment",target:"_blank",rel:"noopener noreferrer"}},[t._v("document.createDocumentFragment()"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developer.mozilla.org/en-US/docs/Web/API/Document/createTextNode",target:"_blank",rel:"noopener noreferrer"}},[t._v("document.createTextNode()"),a("OutboundLink")],1)]),t._v(" "),a("li",[a("a",{attrs:{href:"https://developers.google.com/web/fundamentals/performance",target:"_blank",rel:"noopener noreferrer"}},[t._v("Google Web Fundamentals - Performance"),a("OutboundLink")],1)])]),t._v(" "),a("h2",{attrs:{id:"appending-an-element-to-a-container"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#appending-an-element-to-a-container"}},[t._v("#")]),t._v(" Appending an element to a container")]),t._v(" "),a("p",[a("strong",[t._v("Solution 1:")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#parent'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#child'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[a("strong",[t._v("Solution 2:")])]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#child'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("appendTo")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'#parent'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("Both solutions are appending the element "),a("code",[t._v("#child")]),t._v(" (adding at the end) to the element "),a("code",[t._v("#parent")]),t._v(".")]),t._v(" "),a("p",[t._v("Before:")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("div id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"parent"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("span"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("other content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("span"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("div"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("div id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"child"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("div"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n")])])]),a("p",[t._v("After:")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("div id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"parent"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("span"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("other content"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("span"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("div id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"child"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("div"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("div"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n")])])]),a("p",[a("strong",[t._v("Note:")]),t._v(" When you append content that already exsists in the document, this content will be removed from its original parent container and appended to the new parent container. So you can't use "),a("code",[t._v(".append()")]),t._v(" or "),a("code",[t._v(".appendTo()")]),t._v(" to clone an element. If you need a clone use "),a("code",[t._v(".clone()")]),t._v(" -> "),a("a",{attrs:{href:"http://api.jquery.com/clone/%5D%5B1%5D",target:"_blank",rel:"noopener noreferrer"}},[t._v("[http://api.jquery.com/clone/][1]"),a("OutboundLink")],1)]),t._v(" "),a("h2",{attrs:{id:"jquery-append"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#jquery-append"}},[t._v("#")]),t._v(" jQuery append")]),t._v(" "),a("p",[t._v("HTML")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("p"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("This is a nice "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("p"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("p"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),a("span",{pre:!0,attrs:{class:"token constant"}},[t._v("I")]),t._v(" like "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("p"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("ul"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("List item "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("List item "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("List item "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("li"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("ul"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("button id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"btn-1"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("Append text"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("button"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),t._v("button id"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"btn-2"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("Append list item"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("button"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("\n\n")])])]),a("p",[t._v("Script")]),t._v(" "),a("div",{staticClass:"language-js extra-class"},[a("pre",{pre:!0,attrs:{class:"language-js"}},[a("code",[a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"#btn-1"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("click")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"p"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('" Book."')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"#btn-2"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("click")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("$")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"ul"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("append")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Appended list item"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("h4",{attrs:{id:"syntax"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#syntax"}},[t._v("#")]),t._v(" Syntax")]),t._v(" "),a("ol",[a("li",[t._v("$(selector).append(content)")]),t._v(" "),a("li",[t._v("$(content).appendTo(selector)")])]),t._v(" "),a("h4",{attrs:{id:"parameters"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#parameters"}},[t._v("#")]),t._v(" Parameters")]),t._v(" "),a("table",[a("thead",[a("tr",[a("th",[t._v("Parameters")]),t._v(" "),a("th",[t._v("Details")])])]),t._v(" "),a("tbody",[a("tr",[a("td",[t._v("content")]),t._v(" "),a("td",[t._v("Possible types: Element, HTML string, text, array, object or even a function returning a string.")])])])]),t._v(" "),a("h4",{attrs:{id:"remarks"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#remarks"}},[t._v("#")]),t._v(" Remarks")]),t._v(" "),a("li",[a("p",[t._v(".append() & .after() can potentially execute code. This can occur by\ninjection of script tags or use of HTML attributes that execute code\n(for example, ). Do not use these methods to insert\nstrings obtained from untrusted sources such as URL query parameters,\ncookies, or form inputs. Doing so can introduce cross-site-scripting\n(XSS) vulnerabilities. Remove or escape any user input before adding\ncontent to the document.")])]),t._v(" "),a("li",[a("p",[t._v("jQuery doesn't officially support SVG. Using jQuery methods on SVG"),a("br"),t._v("\ndocuments, unless explicitly documented for that method, might cause\nunexpected behaviors. Examples of methods that support SVG as of"),a("br"),t._v("\njQuery 3.0 are addClass and removeClass.")])])])}),[],!1,null,null,null);s.default=e.exports}}]);