pascal
/
pas2js
mirror of https://gitlab.com/freepascal.org/fpc/pas2js.git


			
				
					
						
						
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  <title>Project1</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="bulma.min.css" rel="stylesheet">
  <script src="exceptdemo2.js"></script>
  <style>

  .source {
    /* width: 730px; */
    margin: -45px auto;
    font-size: 0.9em;
  }

  .source-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* width: 482px; */
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  </style>

</head>
<body>
  <div class="section pb-4">
    <h1 class="title is-4">Exceptions: Getting webassembly Pascal exception info</h1>
    <p>
    <p>The <em>wasm.exceptions</em> unit in FPC exposes 2 functions which allow you to retrieve exception information from the free pascal RTL.
    The default behaviour of the WASI hosting environment is to wrap all calls to a WebAssembly function and use these functions transform the
    exception to a <em>EWasmNativeException</em> exception.
    </p>
    <p>
    The output below shows the result of catching this exception.
    </p>
    <div class="box" id="pasjsconsole"></div>
  </div>
  <div class="section">
    <div class="source">
      <div class="source-inner">
        <div>
          <p>Created using &nbsp; <a target="_blank" href="https://wiki.freepascal.org/pas2js">pas2js.</a> </p>
          <p>Pas2JS Sources: &nbsp; <a target="new" href="exceptdemo.lpr">Pas2JS Program</a></p>
          <p>Webassembly Sources: &nbsp; <a target="new" href="demolib.lpr">FPC Program</a></p>
        </div>
      </div>
    </div>
  </div>

  <script>
    rtl.showUncaughtExceptions=true;
    window.addEventListener("load", rtl.run);
  </script>
</body>
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