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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/core-js/library/modules/_microtask.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/core-js/library/modules/_microtask.js')
-rw-r--r--node_modules/core-js/library/modules/_microtask.js69
1 files changed, 69 insertions, 0 deletions
diff --git a/node_modules/core-js/library/modules/_microtask.js b/node_modules/core-js/library/modules/_microtask.js
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+++ b/node_modules/core-js/library/modules/_microtask.js
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+var global = require('./_global');
+var macrotask = require('./_task').set;
+var Observer = global.MutationObserver || global.WebKitMutationObserver;
+var process = global.process;
+var Promise = global.Promise;
+var isNode = require('./_cof')(process) == 'process';
+
+module.exports = function () {
+ var head, last, notify;
+
+ var flush = function () {
+ var parent, fn;
+ if (isNode && (parent = process.domain)) parent.exit();
+ while (head) {
+ fn = head.fn;
+ head = head.next;
+ try {
+ fn();
+ } catch (e) {
+ if (head) notify();
+ else last = undefined;
+ throw e;
+ }
+ } last = undefined;
+ if (parent) parent.enter();
+ };
+
+ // Node.js
+ if (isNode) {
+ notify = function () {
+ process.nextTick(flush);
+ };
+ // browsers with MutationObserver, except iOS Safari - https://github.com/zloirock/core-js/issues/339
+ } else if (Observer && !(global.navigator && global.navigator.standalone)) {
+ var toggle = true;
+ var node = document.createTextNode('');
+ new Observer(flush).observe(node, { characterData: true }); // eslint-disable-line no-new
+ notify = function () {
+ node.data = toggle = !toggle;
+ };
+ // environments with maybe non-completely correct, but existent Promise
+ } else if (Promise && Promise.resolve) {
+ // Promise.resolve without an argument throws an error in LG WebOS 2
+ var promise = Promise.resolve(undefined);
+ notify = function () {
+ promise.then(flush);
+ };
+ // for other environments - macrotask based on:
+ // - setImmediate
+ // - MessageChannel
+ // - window.postMessag
+ // - onreadystatechange
+ // - setTimeout
+ } else {
+ notify = function () {
+ // strange IE + webpack dev server bug - use .call(global)
+ macrotask.call(global, flush);
+ };
+ }
+
+ return function (fn) {
+ var task = { fn: fn, next: undefined };
+ if (last) last.next = task;
+ if (!head) {
+ head = task;
+ notify();
+ } last = task;
+ };
+};