overlay not showing up (mac os)

"testing" ?? "not set"

"testing" ?? "not set"

navigator.userAgent

navigator.userAgent

a = 1;
a ??= 2

a = 1;
a ??= 2

(function() {
  const results = {
    'Arrow Functions': false,
    'Classes': false,
    'Template Literals': false,
    'Destructuring Assignment': false,
    'Default Parameters': false,
    'Promises': false,
    'Let and Const': false,
    'Spread Operator': false,
    'Modules': false,
    'Async/Await': false,
  };

  // Test Arrow Functions
  try {
    new Function('() => {}')();
    results['Arrow Functions'] = true;
  } catch (e) {}

  // Test Classes
  try {
    class TestClass {}
    results['Classes'] = true;
  } catch (e) {}

  // Test Template Literals
  try {
    const testString = `Hello, World!`;
    results['Template Literals'] = true;
  } catch (e) {}

  // Test Destructuring Assignment
  try {
    const { a } = { a: 1 };
    results['Destructuring Assignment'] = true;
  } catch (e) {}

  // Test Default Parameters
  try {
    function testFunc(a = 1) {}
    results['Default Parameters'] = true;
  } catch (e) {}

  // Test Promises
  try {
    new Promise((resolve) => resolve());
    results['Promises'] = true;
  } catch (e) {}

  // Test Let and Const
  try {
    let testLet = 1;
    const testConst = 2;
    results['Let and Const'] = true;
  } catch (e) {}

  // Test Spread Operator
  try {
    const arr = [1, 2, 3];
    const newArr = [...arr];
    results['Spread Operator'] = true;
  } catch (e) {}

  // Test Modules (using dynamic import)
  try {
    import('./dummy-module.js').then(() => {
      results['Modules'] = true;
    }).catch(() => {});
  } catch (e) {}

  // Test Async/Await
  try {
    async function testAsync() {
      await Promise.resolve();
    }
    testAsync();
    results['Async/Await'] = true;
  } catch (e) {}

  // Log results
  setTimeout(() => {
    console.log('ES6 Feature Support Report:');
    for (const [feature, supported] of Object.entries(results)) {
      console.log(`${feature}: ${supported ? 'Supported' : 'Not Supported'}`);
    }
  }, 100); // Delay to ensure async tests complete
})();

(function() {
  const results = {
    'Arrow Functions': false,
    'Classes': false,
    'Template Literals': false,
    'Destructuring Assignment': false,
    'Default Parameters': false,
    'Promises': false,
    'Let and Const': false,
    'Spread Operator': false,
    'Modules': false,
    'Async/Await': false,
  };

  // Test Arrow Functions
  try {
    new Function('() => {}')();
    results['Arrow Functions'] = true;
  } catch (e) {}

  // Test Classes
  try {
    class TestClass {}
    results['Classes'] = true;
  } catch (e) {}

  // Test Template Literals
  try {
    const testString = `Hello, World!`;
    results['Template Literals'] = true;
  } catch (e) {}

  // Test Destructuring Assignment
  try {
    const { a } = { a: 1 };
    results['Destructuring Assignment'] = true;
  } catch (e) {}

  // Test Default Parameters
  try {
    function testFunc(a = 1) {}
    results['Default Parameters'] = true;
  } catch (e) {}

  // Test Promises
  try {
    new Promise((resolve) => resolve());
    results['Promises'] = true;
  } catch (e) {}

  // Test Let and Const
  try {
    let testLet = 1;
    const testConst = 2;
    results['Let and Const'] = true;
  } catch (e) {}

  // Test Spread Operator
  try {
    const arr = [1, 2, 3];
    const newArr = [...arr];
    results['Spread Operator'] = true;
  } catch (e) {}

  // Test Modules (using dynamic import)
  try {
    import('./dummy-module.js').then(() => {
      results['Modules'] = true;
    }).catch(() => {});
  } catch (e) {}

  // Test Async/Await
  try {
    async function testAsync() {
      await Promise.resolve();
    }
    testAsync();
    results['Async/Await'] = true;
  } catch (e) {}

  // Log results
  setTimeout(() => {
    console.log('ES6 Feature Support Report:');
    for (const [feature, supported] of Object.entries(results)) {
      console.log(`${feature}: ${supported ? 'Supported' : 'Not Supported'}`);
    }
  }, 100); // Delay to ensure async tests complete
})();