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How can we ensure that the jQuery library is loaded before any of our JavaScript codes uses $ or jQuery variable?
In order to do so, we can test whether window.jQuery is defined before referencing the $ or jQuery variable. If window.jQuery is not defined yet, then we wait for some time before checking again.
<body>
<script async src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script>
function run() {
if (window.jQuery) {
$(document).ready(function() {
alert('Hello there');
});
}
else {
setTimeout(run, 50);
}
}
run();
</script>
</body>
Further explanation can be found at How to prevent "Uncaught ReferenceError: jQuery / $ is not defined" - Techcoil Blog
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- jQuery Plugin For Custom Filterable Select Box - Editable Select | Free jQuery Plugins (jqueryscript.net)
- jQuery Plugin For Filterable Bootstrap Dropdown Select - Bootstrap Select | Free jQuery Plugins (jqueryscript.net)
- Tiny AJAX-Compatible Input Autocomplete Plugin - autocompleter | Free jQuery Plugins (jqueryscript.net)
- How To Create a Filter/Search List (w3schools.com)
- How To Search for Items in a Dropdown (w3schools.com)
Referenced in:
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