Always use 4 spaces for indentation of code blocks.

Always put spaces around operators ( = + - * / ), and after commas:

let x = y + z;
const myArray = ["Volvo", "Saab", "Fiat"];

Always end a simple statement with a semicolon.

Each statement is followed by a line-break.

Braces are required for all control structures (i.e. if, else, for, do, while, as well as any others), even if the body contains only a single statement. The first statement of a non-empty block must begin on its own line.

Any array or object literal may optionally be formatted as if it were a “block-like construct”.

const a = [
    0,
    1,
    2,
];

const b = [0, 1, 2];

const c = {
    a: 0,
    b: 1,
};

const d = {a: 0, b: 1};

Variable, parameter and function names written as camelCase

Constants and Enum properties written in UPPERCASE

Class names and Enum names written in PascalCase

Declare all local variables with either const or let. Use const by default, unless a variable needs to be reassigned. The var keyword must not be used.

Every local variable declaration declares only one variable: declarations such as let a = 1, b = 2; are not used.

JavaScript doesn't have Enum construct. We use frozen object with string properties as a replacement. Usually, when we send data from server to client, enum values are encoded as strings. These strings can be compared to the Enum property values.

const ParserType = Object.freeze({
    SCRIPTED: "scripted",
    CSV: "csv",
    JSON: "json-simple"
});

if (parser.type === ParserType.JSON) {
	
}