Source code
Revision control
Copy as Markdown
Other Tools
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
<html>
  <head>
    <title>Return Values</title>
  </head>
  <body>
    <script>
    function return_something(x) {
      debugger;
      return x;
    }
    function callee(x) {
      throw x;
    }
    function throw_something(x) {
      try {
        callee(x);
      } catch (e) {
        // Ignore.
      }
    }
    </script>
    <h3>Returns</h3>
    <button onclick="return_something(2)">return(2)</button>
    <button onclick="return_something(new Error('blah'))">return(error)</button>
    <button onclick="return_something(undefined)">return(undefined)</button>
    <button onclick="return_something(false)">return(false)</button>
    <button onclick="return_something(null)">return(null)</button>
    <button onclick="return_something(0)">return(0)</button>
    <button onclick="return_something('yay')">return('yay')</button>
    <h3>Throws</h3>
    <button onclick="throw_something(2)">throw(2)</button>
    <button onclick="throw_something(new Error('blah'))">throw(error)</button>
    <button onclick="throw_something(undefined)">throw(undefined)</button>
    <button onclick="throw_something(false)">throw(false)</button>
    <button onclick="throw_something(0)">throw(0)</button>
    <button onclick="throw_something(null)">throw(null)</button>
    <button onclick="throw_something('yay')">throw('yay')</button>
  </body>
</html>