CompilersCourse/index.html at ref · IlyasKhatipov/CompilersCourse · GitHub

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<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>O program in WebAssembly</title>
  </head>
  <body>
    <pre id="log"></pre>
    <script>
      const logElem = document.getElementById("log");
      function logLine(text) {
        logElem.textContent += text + "\n";
        console.log(text);
      }
      async function main() {
        try {
          const response = await fetch("out5.wasm");
          const bytes = await response.arrayBuffer();
          const module = await WebAssembly.instantiate(bytes, {
            env: {
              print_i32: function(x) {
                logLine("output: " + x);
              }
            }
          });
          if (module.instance.exports._start) {
            module.instance.exports._start();
          } else if (module.instance.exports.main) {
            module.instance.exports.main();
          } else {
            logLine("No _start or main export in wasm module");
          }
        } catch (e) {
          logLine("Error: " + e);
        }
      }
      main();
    </script>
  </body>
</html>