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此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.greasyfork.icu/scripts/447936/1268103/b-live-random-send-test.js
// 1.5.8
const blobURL = URL.createObjectURL(
new Blob(
[
'(',
function () {
const ids = {};
// 监听message 开始执行定时器或者销毁
self.onmessage = (e) => {
switch (e.data.command) {
case 'interval:start': // 开启定时器
const intervalId = setInterval(() => postMessage({ message: 'interval:tick', id: e.data.id }), e.data.interval);
// postMessage({ message: 'interval:started', id: e.data.id });
ids[e.data.id] = intervalId;
break;
case 'interval:clear': // 销毁
clearInterval(ids[e.data.id]);
postMessage({ message: 'interval:cleared', id: e.data.id });
delete ids[e.data.id];
break;
case 'timeout:start':
const timeoutId = setTimeout(() => postMessage({ message: 'timeout:tick', id: e.data.id }), e.data.timeout);
// postMessage({ message: 'timeout:started', id: e.data.id });
ids[e.data.id] = timeoutId;
break;
case 'timeout:clear':
clearTimeout(ids[e.data.id]);
postMessage({ message: 'timeout:cleared', id: e.data.id });
delete ids[e.data.id];
break;
}
};
}.toString(),
')()',
],
{ type: 'application/javascript' },
),
);
const worker = new Worker(blobURL);
URL.revokeObjectURL(blobURL); //用完释放URL对象
const workerTimer = {
id: 0,
callbacks: {},
setInterval: (cb, interval, context) => {
const id = ++workerTimer.id;
workerTimer.callbacks[id] = { fn: cb, context: context };
worker.postMessage({ command: 'interval:start', interval: interval, id: id });
return id;
},
setTimeout: (cb, timeout, context) => {
const id = ++workerTimer.id;
workerTimer.callbacks[id] = { fn: cb, context: context };
worker.postMessage({ command: 'timeout:start', timeout: timeout, id: id });
return id;
},
// 监听worker 里面的定时器发送的message 然后执行回调函数
onMessage: (e) => {
switch (e.data.message) {
case 'interval:tick':
case 'timeout:tick':
const callbackItem = workerTimer.callbacks[e.data.id];
if (callbackItem && callbackItem.fn) {
callbackItem.fn.apply(callbackItem.context);
}
break;
case 'interval:cleared':
case 'timeout:cleared':
delete workerTimer.callbacks[e.data.id];
break;
}
},
// 往worker里面发送销毁指令
clearInterval: (id) => worker.postMessage({ command: 'interval:clear', id: id }),
clearTimeout: (id) => worker.postMessage({ command: 'timeout:clear', id: id }),
};
worker.onmessage = workerTimer.onMessage.bind(workerTimer);