What is event bubbling and capturing? 答案1 Event bubbling and capturing are two ways of event propagation in the HTML DOM API, when an event occurs in an element inside another element, and both elements have registered a handle for that event. The ev…
个人翻译 原文:https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/ The Node.js Event Loop, Timers, and process.nextTick() What is the Event Loop? 什么是事件循环圈? The event loop is what allows Node.js to perform non-blocking I/O operations — despite…
The Node.js Event Loop, Timers, and process.nextTick() | Node.js https://nodejs.org/uk/docs/guides/event-loop-timers-and-nexttick/ What is the Event Loop? The event loop is what allows Node.js to perform non-blocking I/O operations - despite the fact…
原文地址:http://javascript.info/tutorial/bubbling-and-capturing 先给出最终的结论: Summary Events first are captured down to deepest target, then bubble up. In IE<9 they only bubble. All handlers work on bubbling stage excepts addEventListener with last argument …
浏览器环境 以下两段代码是等价的.req对事件的回调设置,实际上就是当前主线程任务队列的任务. var req = new XMLHttpRequest(); req.open('GET', url); req.onload = function (){}; req.onerror = function (){}; req.send(); //equal var req = new XMLHttpRequest(); req.open('GET', url); req.send(); req.o…
