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问题:

I am using bootstrap-4 in my Vue webapp, But I am not able to customise this as is explained here.

I have my index.html which uses Bootstrap CDN, like following:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta http-equiv="x-ua-compatible" content="ie=edge">

    <title>Sample</title>
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">

    <link rel="stylesheet" href="/static/custom.scss" type="text/x-scss">  ==> where I am overwriting variable
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css" integrity="sha384-AysaV+vQoT3kOAXZkl02PThvDr8HYKPZhNT5h/CXfBThSRXQ6jW5DO2ekP5ViFdi" crossorigin="anonymous">

    <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.3.7/js/tether.min.js" integrity="sha384-XTs3FgkjiBgo8qjEjBk0tGmf3wPrWtA6coPfQDfFEY8AnYJwjalXCiosYRBIBZX8" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/js/bootstrap.min.js" integrity="sha384-BLiI7JTZm+JWlgKa0M0kGRpJbF2J8q+qreVrKBC47e3K6BW78kGLrCkeRX6I9RoK" crossorigin="anonymous"></script>
  </head>
  <body>
    <div id="app"></div>

    <script src="/dist/client-vendor-bundle.js"></script>
    <script src="/dist/client-bundle.js"></script> -->
  </body>
</html>

I also tried changing the order of custom.scss and bootstrap.css in index.html as well.

Following is custom.scss, where I am overwriting variables:

$body-bg:    #f5f5f5;
$body-color: #f5f5f5;
$enable-flex: true;

But this is not working.

I also tried importing this in my app component, like following:

<style lang="scss">
  @import 'custom.scss';

  // Following also did not work
  $body-bg: #333;
  $body-color: #999;  
</style>

How do I overwrite these variable to customise my webapp.

回答1:

You can make this a lot cleaner by using the npm package and a webpack customisation.

If you first install bootstrap in your project:

npm install bootstrap@4.0.0-alpha.5

and make sure you can use sass-loader in your components:

npm install sass-loader node-sass --save-dev

now go to your webpack config file and add a sassLoader object with the following:

sassLoader: {
    includePaths: [
        path.resolve(projectRoot, 'node_modules/bootstrap/scss/'),
    ],
},

projectRoot should just point to where you can navigate to node_packages from, in my case this is: path.resolve(__dirname, '../')

Now you can use bootstrap directly in your .vue files and webpack will compile it for you when you add the following:

<style lang="scss">
  @import "bootstrap";
</style>

To customise it I'd recommend pulling in the bootstrap _variables first and then you can reference everything like normal, i.e.

@import "_variables";

// example customisation - I'd recommend importing a file here to store them all
$body-bg: $gray-dark;

// just place all your customisation work above the below import of bootstrap
@import "bootstrap";

This will mean you need to remove any CDN CSS versions or they could overwrite things, but you should now be able to fully customise bootstrap.

As another benefit this method allows you to strip out any bootstrap components you are not using. To do so rather than @import "bootstrap"; which is the entire bootstrap library, instead navigate to that file, i.e. node_modules/bootstrap/scss/bootstrap.scss and then copy across the @import's you actually want. Essentially optimising your project...

回答2:

I tried following approach which worked:

cloned the bootstrap repo
modified _custom.scss in this directory.
ran npm install
ran grunt dist as is in documentation
copied generated bootstrap css and js files from here in my index.html

so my index.html has following:

<link rel="stylesheet" href="/static/bootstrap.css" type="text/css">

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.3.7/js/tether.min.js" integrity="sha384-XTs3FgkjiBgo8qjEjBk0tGmf3wPrWtA6coPfQDfFEY8AnYJwjalXCiosYRBIBZX8" crossorigin="anonymous"></script>
<script href="/static/bootstrap.js"></script>

As of now, I don't think customising is possible when using CDN link of bootstrap.