How to use npm-installed bootstrap in express? - node.js

I 'm a beginner of Node.js development,
Now I try to use bootstrap framework in my first Express web app.
I use
npm install bootstrap
to download the files,and it seems that npm puts them in my node_modules folder.
My question is how can I refer to the bootstrap files in my views in express?
I know a typical way is copying the bootstrap file into the public folder. So my html files can find them. But I don't think this is a good idea.
Thank you.

You need to use in your server.js:
app.use(express.static(__dirname + '/node_modules/bootstrap/dist'));
to define a static resourse and then use:
<script language="javascript" src="js/bootstrap.min.js"></script>
<link rel="stylesheet" href="css/bootstrap.min.css"/>

I found a similar question. In which the solution is explained better by #augusto-goncalves. His solution works for me. It is similar to the solution of #victor-behar but more elaborated and clears confusion.

You have to reference it in the <script> and <link> tags in the header or at the bottom of your main script.
If you're using express, you're probably using templating. To use it in your header part or in your main template (depending on how you've managed your views) like :
<script language="javascript" src="node_modules/bootstrap/.../bootstrap.min.js"></script>
and
<link rel="stylesheet" href="node_modules/bootstrap/.../bootstrap.min.css"/>
This works only if you didn't moved your files with a gulp or a grunt task

There's also a way to transpile scss in express using node sass middleware, for example https://github.com/sass/node-sass-middleware.
That way you can override bootstrap scss. You can do the same for JS with webpack: transpile client-side js and then include the bundle.js in your frontend.

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!
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You need to make sure you set the public directory for your files to be accessed by express. This is an example:
app.use(express.static(__dirname + '/public'));
Then you need to reference your front-end files (css, img, etc.) in reference to this directory (so if you have a public/img folder, the reference url will be <img src="img/NAMEOFIMAGE.jpg">
Hope this helps. Comment below with any issues.
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I have tried with above code, it's working fine. I have seen there are some modules in npm to server favicon images. If I add through html, why I have to use this modules to serve.
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<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular-cookies.min.js"></script>
<% } else { %>
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<script src="/js/bootstrap.min.js"></script>
<script src="/js/angular.min.js"></script>
<script src="/js/angular-resource.min.js"></script>
<script src="/js/angular-cookies.min.js"></script>
<% } %>
https://github.com/hectorcorrea/hectorcorrea.com/blob/master/views/index.ejs#L136
In my example, the value is hard coded, but you could easily pass Express dev/prod value to the view to get the same thing done automatically.

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