Shulou(Shulou.com)06/03 Report--

Editor to share with you what are the types of JavaScript agent model, I hope you will gain something after reading this article, let's discuss it together!

1. The types of agents mainly include protection agents and virtual agents. Protection agents are used to control the access of different permission objects to the target object.

2. Virtual agents postpone high-cost objects until they are really needed.

Virtual agents are more commonly used in Javascript.

Example

Var myImage = (function () {var imgNode = document.createElement ('img'); document.body.appendChild (imgNode); return {setSrc: function (src) {imgNode.src = src;}) (); var proxyImage = (function () {var img = new Image; img.onload = function () {myImage.setSrc (this.src) } return {setSrc: function (src) {myImage.setSrc ('. / loading.gif'); img.src = src;}) (); proxyImage.setSrc ('http://xxxxx.jpg'); After reading this article, I believe you have a certain understanding of "what are the types of JavaScript agent models". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.