Webpack bundle - Bootstrap的JavaScript需要jQuery

Question

I am trying to achieve the following:

• bundle ( in this order ) jquery , tether , and bootstrap.js .
• load this bundle within a HTML page and beneath it load other page specific scripts.

To achieve this I am using webpack 2 and the CommonsChunkPlugin . Here is my config.

For entries I have:

const scriptsEntry = {
    blog_index: SRC_DIR + "/js/pages/blog_index.js",
    blog_about: SRC_DIR + "/js/pages/blog_about.js",
    vendor: ["jquery", "tether", "bootstrap"]
};

In the plugins section:

scriptsPlugins.push(
    new webpack.optimize.CommonsChunkPlugin({
        name: "vendor", 
        filename:"vendor.bundle.js", 
        minChunks: 2
    }),
    ...
}));

Inside 'index.html' I load the bundles:

<script src="{{ url_for('static', filename='dist/js/vendor.bundle.js') + anti_cache_token }}"></script>
<script src="{{ url_for('static', filename='dist/js/home.js') + anti_cache_token }}"></script>

Inside the source directory in the blog_index.js I make use of jquery :

import $ from "jquery";

$(".home-click").click(function () {
    alert("clicked from .home-click");
});

The result:

• everything bundles without any errors.
• when I click .home-click the alert box fires as expected.
• checking the bundled files I see that:
  • vendor.bundle.js contains: jquery , tether , and bootstrap .
  • looking inside, for instance, blog_index.js (after it was run through webpack 2 ), I notice that the jquery import is not bundled inside this file, but vendor.bundle.js (this is as expected).

However, I have the following problem when I check the browser console:

I tried switching the order of the libraries in this line vendor: ["jquery", "tether", "bootstrap"] , but nothing changed--the error is still there.

Do you know how can I solve this, preferably without using additional webpack plugins?

Answer 1

Bootstrap's javascript assumes that jQuery is hooked on the window object, it does not require it or anything.

By bundling stuff up, you do not expose variables to the global scope, or at least you should not be doing that. So the bootstrap code cannot find jQuery.

Add this to your plugins and you should be ok

new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    'window.jQuery': 'jquery',
    tether: 'tether',
    Tether: 'tether',
    'window.Tether': 'tether',
})

This will replace all instances where jQuery is assumed as global with the export of the jQuery package, which is the jQuery object. Same for Tether