title: Uncaught SyntaxError: Unexpected token < on each js file that invoked in the index html
body: <p>I am using mean stack to build a website, when testing, chrome returns the error like:</p>
  
  <blockquote>
    <p>Uncaught SyntaxError: Unexpected token &lt;   angular.js:1. </p>
  </blockquote>
  
  <p>I don't know what's wrong and what should i do. </p>
  
  <p><a href="https://i.stack.imgur.com/sb7n4.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sb7n4.png" alt="enter image description here"></a></p>
  
  <p>Here is the directory of my app:
  <code>E-study
    -client
     -app
     -components
      -all the libraries are here.
     -index.html
     -controllers.js
    -node_modules
    -server
     -config
      -server.js
  </code></p>
  
  <p>And I run the server in E-study like :<code>node server/config/server.js</code></p>
  
  <p>The scripts in the index.html is<code>&lt;script src="client/components/angular/angular.js"&gt;&lt;/script&gt;</code></p>
  
  <p>Just don't know why all the js files are changed to index.html when open in the browser.</p>