\n \n\n\nEnsure compatibility by matching your jQuery version with your Bootstrap version.","image":"https://explain.codes/media/static/images/eightify-logo.svg","author":{"@type":"Person","name":"Nikita Barsukov","url":"https://explain.codes//author/nikita-barsukov"},"publisher":{"@type":"Organization","name":"Rational Expressions, Inc","logo":{"@type":"ImageObject","url":"https://explain.codes/landing/images/[email protected]"}},"datePublished":"2025-01-18T15:30:01.230Z","dateModified":"2025-01-18T15:30:03.323Z"}
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Bootstrap throws Uncaught Error: Bootstrap's JavaScript requires jQuery

javascript
script-inclusion
jquery
bootstrap
Nikita BarsukovbyNikita Barsukov·Jan 18, 2025
TLDR

For an immediate resolution of the Bootstrap's JavaScript requires jQuery error, make sure to load jQuery before Bootstrap's JS:

<!-- Correct ordering wizardry: Summoning jQuery first, then Bootstrap JS --> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <!-- Abracadabra! jQuery appears --> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script> <!-- Voila! Bootstrap JS follows -->

Ensure compatibility by matching your jQuery version with your Bootstrap version.

Order of script inclusion in HTML

The DOM sequence matters

The sequence of your <script> tags is essential. Place jQuery first so it's loaded before Bootstrap. If you disobey this cardinal rule, Bootstrap's JavaScript couldn't find jQuery and would retaliate with an Uncaught Error.

Checking the file paths

Ensure that the file paths to jQuery and Bootstrap are accurate. Even Omar Little wouldn't rob you for making a tiny typo. Developer tools can come to your rescue here. Use them to check if the files are correctly loaded.

Version synchronization

What's a shot without its chaser? Your Bootstrap version should pair well with your jQuery. Check the documentation to ensure the versions are compatible to prevent conflicts.

Dealing with CDNs and package managers

Consistency in CDN usage

If you're using a CDN, try to serve both jQuery and Bootstrap from the same CDN to prevent inconsistencies. Think of it as an ecosystem where everything thrives harmoniously when the environment is consistent.

Using npm or yarn for dependencies

If you're really into solving npm dependency graph issues on a breezy Sunday afternoon (who isn't?), using a package manager like npm or yarn to manage dependencies is a great option. They help with installing the correct version, upgrades, and basically all the dependency jamboree.

Game plan for common issues

Beware the CommonJS and browser code mixing

CommonJS modules and browser scripts don't share the same lunch table🍱. A conflict between these two can lead to Bootstrap failing to recognize jQuery.

Electron app specifics

Developing an Electron app? Lucky you! Just remember to set nodeIntegration to false, if it's not needed, because it can mess with global variables such as, yep, you guessed it, jQuery!

Manual jQuery assignment

In complex scenarios, manually assigning jQuery to the window object might be necessary. It's not the most elegant ballet move, but hey, sometimes you have to dance in the rain.

window.jQuery = require('jquery'); // This is jQuery saying "You shall pass"

Console monitoring and syntax checks

Keeping an eye on the console

A watchful eye on the console can save the day. Look out for error messages. They're clues dropped by the crime scene, leading you to the culprit - incorrect script loading.

Possible hiccups in syntax

Go Sherlock on your <script> tags. An omitted closing tag or forgotten quote can happen. Sure, it's embarrassing, but we've all been there and the t-shirt isn't even nice.

The concept of progressive enhancement

Use progressive enhancement wisely. Ensure your site works without Bootstrap's JavaScript. You don't want to lose core functionalities just because the cherry on top is missing.