chromium/src/third_party/blink/web_tests/external/wpt/html/interaction/focus/the-autofocus-attribute/resources/utils.js

'use strict';

function waitForEvent(target, type, options) {
  return new Promise((resolve, reject) => {
    target.addEventListener(type, resolve, options);
  });
}

function waitForAnimationFrame(w) {
  let targetWindow = w || window;
  return new Promise((resolve, reject) => {
    targetWindow.requestAnimationFrame(resolve);
  });
}

function waitForEvent(target, type, options) {
  return new Promise((resolve, reject) => {
    target.addEventListener(type, resolve, options);
  });
}

function waitForLoad(target) {
  return waitForEvent(target, 'load');
}

function timeOut(test, ms) {
  return new Promise((resolve, reject) => {
    test.step_timeout(resolve, ms);
  });
}

// If an element with autofocus is connected to a document and this function
// is called, the autofocus result is deterministic after returning from the
// function.
// Exception: If the document has script-blocking style sheets, this function
// doesn't work well.
async function waitUntilStableAutofocusState(w) {
  let targetWindow = w || window;
  // Awaiting one animation frame is an easy way to determine autofocus state.
  await waitForAnimationFrame(targetWindow);
}