[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers,小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含1002字,纯文字阅读大概需要2分钟。
内容图文
![[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers](/upload/InfoBanner/zyjiaocheng/508/c5fbd954a741465eaacb0895b8ceb3d7.jpg)
A Proxy
allows you to trap what happens when you try to get a property value off of an object and do some behavior before the value is accessed. For example, you could check the name of the property and always return a certain value or even check if the property is undefined and return some default. The options are unlimited.
"use strict" let person = { name: "John" } let handler = { get(target, key) { if (key === "name") { return "Mindy" } if (Reflect.has(target, key)) { return Reflect.get(target, key) } return "You tried to access something undefined" } } person = new Proxy(person, handler) console.log(person.name) // "Mindy" console.log(person.age) // "You tried to access something undefined"
[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers
标签:str obj could let name code amp check prope
本文系统来源:https://www.cnblogs.com/Answer1215/p/10957810.html
内容总结
以上是互联网集市为您收集整理的[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers全部内容,希望文章能够帮你解决[Javascript] Customize Behavior when Accessing Properties with Proxy Handlers所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错,欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 gblab@vip.qq.com 举报,一经查实,本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。