Browse Source

BI-60021 兼容性-fix内部nextTick在火狐下有兼容问题(先还原,已建任务研究)

es6
windy 5 years ago
parent
commit
045a3ca58d
  1. 81
      dist/fix/fix.js

81
dist/fix/fix.js vendored

@ -120,59 +120,42 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
}
}
// Here we have async deferring wrappers using microtasks.
// In 2.5 we used (macro) tasks (in combination with microtasks).
// However, it has subtle problems when state is changed right before repaint
// (e.g. #6813, out-in transitions).
// Also, using (macro) tasks in event handler would cause some weird behaviors
// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
// So we now use microtasks everywhere, again.
// A major drawback of this tradeoff is that there are some scenarios
// where microtasks have too high a priority and fire in between supposedly
// sequential events (e.g. #4521, #6690, which have workarounds)
// or even between bubbling of the same event (#6566).
// The nextTick behavior leverages the microtask queue, which can be accessed
// via either native Promise.then or MutationObserver.
// MutationObserver has wider support, however it is seriously bugged in
// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
// completely stops working after triggering a few times... so, if native
// Promise is available, we will use it:
/* istanbul ignore next, $flow-disable-line */
if (typeof Promise !== 'undefined' && isNative(Promise)) {
var p = Promise.resolve();
timerFunc = function timerFunc() {
p.then(nextTickHandler);
};
} else if (!isIE && typeof MutationObserver !== 'undefined' && (isNative(MutationObserver) ||
// PhantomJS and iOS 7.x
MutationObserver.toString() === '[object MutationObserverConstructor]')) {
// Use MutationObserver where native Promise is not available,
// e.g. PhantomJS, iOS7, Android 4.4
// (#6466 MutationObserver is unreliable in IE11)
var counter = 1;
var observer = new MutationObserver(nextTickHandler);
var textNode = document.createTextNode(String(counter));
observer.observe(textNode, {
characterData: true
});
timerFunc = function timerFunc() {
counter = (counter + 1) % 2;
textNode.data = String(counter);
};
} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
// Fallback to setImmediate.
// Technically it leverages the (macro) task queue,
// but it is still a better choice than setTimeout.
// An asynchronous deferring mechanism.
// In pre 2.4, we used to use microtasks (Promise/MutationObserver)
// but microtasks actually has too high a priority and fires in between
// supposedly sequential events (e.g. #4521, #6690) or even between
// bubbling of the same event (#6566). Technically setImmediate should be
// the ideal choice, but it's not available everywhere; and the only polyfill
// that consistently queues the callback after all DOM events triggered in the
// same loop is by using MessageChannel.
/* istanbul ignore if */
if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
timerFunc = function timerFunc() {
setImmediate(nextTickHandler);
};
} else {
// Fallback to setTimeout.
} else if (typeof MessageChannel !== 'undefined' && (isNative(MessageChannel) ||
// PhantomJS
MessageChannel.toString() === '[object MessageChannelConstructor]')) {
var channel = new MessageChannel();
var port = channel.port2;
channel.port1.onmessage = nextTickHandler;
timerFunc = function timerFunc() {
setTimeout(nextTickHandler, 0);
port.postMessage(1);
};
}
} else
/* istanbul ignore next */
if (typeof Promise !== 'undefined' && isNative(Promise)) {
// use microtask in non-DOM environments, e.g. Weex
var p = Promise.resolve();
timerFunc = function timerFunc() {
p.then(nextTickHandler);
};
} else {
// fallback to setTimeout
timerFunc = function timerFunc() {
setTimeout(nextTickHandler, 0);
};
}
return function queueNextTick(cb, ctx) {
var _resolve = void 0;
@ -376,7 +359,7 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
uniq[name] = true;
}
}
//添加访问器属性
//添加访问器属性
for (name in accessors) {
if (uniq[name]) {
continue;

Loading…
Cancel
Save