File: doc-wasm-sourcemaps.html

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 <!-- 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
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8"/>
    <title>Wasm+sourcemaps</title>
    <script src="wasm-sourcemaps/utils.js"></script>
    <script>

    function test() {
      const result = wasmInstance.exports.fib(5);
      console.log(result);
    }

    var wasmInstance = null;
    function loadWasm(wasmUrl, sourceMapUrl) {
      return fetch(wasmUrl).then(res => res.arrayBuffer()).then(buffer => {
        if (!sourceMapUrl) return buffer;
        return updateSourceMappingURLSection(buffer, sourceMapUrl);
      }).then(buffer => WebAssembly.instantiate(buffer)).then(({instance}) => {
        wasmInstance = instance;
      });
    }

    loadWasm('wasm-sourcemaps/fib.wasm',
              new URL('wasm-sourcemaps/fib.wasm.map', document.location).href).then(() => {
      debugger;

      test();
    });
  </script>
  </head>

  <body>
  </body>
</html>