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musix-oss/node_modules/core-js/internals/task.js

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2020-03-03 20:30:50 +00:00
var global = require('../internals/global');
var fails = require('../internals/fails');
var classof = require('../internals/classof-raw');
var bind = require('../internals/function-bind-context');
var html = require('../internals/html');
var createElement = require('../internals/document-create-element');
var IS_IOS = require('../internals/engine-is-ios');
var location = global.location;
var set = global.setImmediate;
var clear = global.clearImmediate;
var process = global.process;
var MessageChannel = global.MessageChannel;
var Dispatch = global.Dispatch;
var counter = 0;
var queue = {};
var ONREADYSTATECHANGE = 'onreadystatechange';
var defer, channel, port;
var run = function (id) {
// eslint-disable-next-line no-prototype-builtins
if (queue.hasOwnProperty(id)) {
var fn = queue[id];
delete queue[id];
fn();
}
};
var runner = function (id) {
return function () {
run(id);
};
};
var listener = function (event) {
run(event.data);
};
var post = function (id) {
// old engines have not location.origin
global.postMessage(id + '', location.protocol + '//' + location.host);
};
// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
if (!set || !clear) {
set = function setImmediate(fn) {
var args = [];
var i = 1;
while (arguments.length > i) args.push(arguments[i++]);
queue[++counter] = function () {
// eslint-disable-next-line no-new-func
(typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
};
defer(counter);
return counter;
};
clear = function clearImmediate(id) {
delete queue[id];
};
// Node.js 0.8-
if (classof(process) == 'process') {
defer = function (id) {
process.nextTick(runner(id));
};
// Sphere (JS game engine) Dispatch API
} else if (Dispatch && Dispatch.now) {
defer = function (id) {
Dispatch.now(runner(id));
};
// Browsers with MessageChannel, includes WebWorkers
// except iOS - https://github.com/zloirock/core-js/issues/624
} else if (MessageChannel && !IS_IOS) {
channel = new MessageChannel();
port = channel.port2;
channel.port1.onmessage = listener;
defer = bind(port.postMessage, port, 1);
// Browsers with postMessage, skip WebWorkers
// IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
} else if (global.addEventListener && typeof postMessage == 'function' && !global.importScripts && !fails(post)) {
defer = post;
global.addEventListener('message', listener, false);
// IE8-
} else if (ONREADYSTATECHANGE in createElement('script')) {
defer = function (id) {
html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
html.removeChild(this);
run(id);
};
};
// Rest old browsers
} else {
defer = function (id) {
setTimeout(runner(id), 0);
};
}
}
module.exports = {
set: set,
clear: clear
};