js如何使用promise实现多个任务队列的中断和恢复？
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<script type="text/javascript">
class PromiseQueue {
constructor() {
this.queue = [];
this.paused = false;
}
addTask(task) {
return new Promise((resolve, reject) => {
const wrapper = () => {
if (this.paused) {
this.queue.push(wrapper);
} else {
task().then(resolve).catch(reject);
}
};
this.queue.push(wrapper);
if (this.queue.length === 1) {
wrapper();
}
});
}
start() {
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by thinkfuture
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