_js/testbrowser.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>mvdan-sh</title>
  </head>
  <body>
    <script>
      var sh = "mock-sh";
    </script>
    <script src="./index.js"></script>
    <script>
      const assert = {
        equal(x, y) {
          if (x !== y) {
            throw new Error("assert error");
          }
        },
      };

      assert.equal(!sh, false);

      const syntax = sh.syntax;
      const parser = syntax.NewParser();
      const printer = syntax.NewPrinter();

      const src = "echo      'foo'";
      const f = parser.Parse(src, "src");
      const out = printer.Print(f);
      assert.equal(out, "echo 'foo'\n");

      assert.equal(sh, (window.newSh = sh.noConflict()));
      assert.equal(sh, "mock-sh");
    </script>
  </body>
</html>