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Fix DOMContentLoaded event dispatch for delayed JS #166

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Merged
mustafauysal merged 3 commits into from
Nov 11, 2025
Merged

Fix DOMContentLoaded event dispatch for delayed JS #166

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2f26e06
Initial plan
Copilot Nov 11, 2025
05e48c7
Initial exploration and planning
Copilot Nov 11, 2025
4b62c5c
Implement DOMContentLoaded event dispatch for delayed scripts
Copilot Nov 11, 2025
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4 changes: 2 additions & 2 deletions dist/js/script-loader.js
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23 changes: 23 additions & 0 deletions includes/classes/FileOptimizer.php
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Original file line number Diff line number Diff line change
Expand Up @@ -802,6 +802,29 @@ public function maybe_delay_scripts( $html ) {
if ( absint( $delay_timeout ) > 0 ) {
$script_loader .= 'Defer.all(\'script[type="pc-delayed-js"]\', window.PCScriptLoaderTimeout, false);' . PHP_EOL;
}

// Dispatch DOMContentLoaded event after delayed scripts are loaded
// This ensures scripts that listen for DOMContentLoaded still execute
$script_loader .= '(function(){' . PHP_EOL;
$script_loader .= ' var pcDelayedScripts=document.querySelectorAll(\'script[type="pc-delayed-js"]\');' . PHP_EOL;
$script_loader .= ' if(pcDelayedScripts.length===0)return;' . PHP_EOL;
$script_loader .= ' var pcScriptCount=pcDelayedScripts.length;' . PHP_EOL;
$script_loader .= ' var pcCheckInterval=setInterval(function(){' . PHP_EOL;
$script_loader .= ' var remaining=document.querySelectorAll(\'script[type="pc-delayed-js"]\').length;' . PHP_EOL;
$script_loader .= ' if(remaining===0){' . PHP_EOL;
$script_loader .= ' clearInterval(pcCheckInterval);' . PHP_EOL;
$script_loader .= ' setTimeout(function(){' . PHP_EOL;
$script_loader .= ' if(document.readyState==="complete"||document.readyState==="interactive"){' . PHP_EOL;
$script_loader .= ' var event=document.createEvent?document.createEvent("Event"):new Event("DOMContentLoaded");' . PHP_EOL;
$script_loader .= ' if(document.createEvent){event.initEvent("DOMContentLoaded",true,true);}' . PHP_EOL;
$script_loader .= ' document.dispatchEvent(event);' . PHP_EOL;
$script_loader .= ' console.log("[Powered Cache] - DOMContentLoaded event dispatched for "+pcScriptCount+" delayed script(s)");' . PHP_EOL;
$script_loader .= ' }' . PHP_EOL;
$script_loader .= ' },10);' . PHP_EOL;
$script_loader .= ' }' . PHP_EOL;
$script_loader .= ' },50);' . PHP_EOL;
$script_loader .= '})();' . PHP_EOL;

$script_loader .= '</script>' . PHP_EOL;

/**
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