摘要：
前端 import { Component, OnInit, ViewChild, ElementRef } from '@angular/core'; import { MediaDevicesService } from '../../media-devices.service'; import 阅读全文
摘要：
<button id="btn1">长按触发</button> <button id="btn2">长按触发2</button> interface IOpt { el: HTMLElement; listener: EventListener; options?: boolean | AddEve 阅读全文