Vue进阶(幺肆幺):Vue计算属性computed方法内传参

No Silver Bullet 2020-11-13 07:28:48
vue 进阶 计算 属性


在前期博文《Vue进阶(八十四):vue中Computed 和 Watch的使用和区别》中,讲解了vue中Computed 和 Watch的使用和区别,其中,只是介绍了computed如何计算元素属性,并未介绍如何方法传参。瓷片博客主要讲解下如何利用computed的计算属性进行传参。

场景引入

在前端项目开发过程中,会遇到码值转换应用场景,且不同页面会存在复用码值转换情况,为提升代码服用率,考虑将码值转换函数抽取为公共函数,在公共函数返回转码后的文字后,如何在页面中合理展示?尝试过方法调用,但是遗憾的是转码后的文字并未在页面展示,此时考虑使用computed计算属性,在结果列表中应用computed计算属性,需要传入列表数据的码值,
vue中computed计算属性无法直接进行传参

如果有传参数的需求比如说做数据筛选功能可以使用闭包函数(也叫匿名函数)实现

例如:

在上篇博客vue安装使用最后的成绩表练习中的过滤功能的实现:

复制代码
<tr v-for="(item,index) in arr" v-if="myfilter(index)">
<td>{
{item.username}}</td>
<td>{
{item.sex}}</td>
<td>{
{item.grade}}</td>
<td>
<a href="#" @click="delClick(index)">删除</a>
</td>
</tr>
computed计算属性:
export default {
name: 'Achievement',
data () {
return {
...
}
},
methods: {
...
},
computed: {
myfilter() {
return function(index){
return this.arr[index].username.match(this.name)!==null;
}
}
}
}
版权声明
本文为[No Silver Bullet]所创,转载请带上原文链接,感谢
https://shq5785.blog.csdn.net/article/details/108483901

  1. [front end -- JavaScript] knowledge point (IV) -- memory leakage in the project (I)
  2. This mechanism in JS
  3. Vue 3.0 source code learning 1 --- rendering process of components
  4. Learning the realization of canvas and simple drawing
  5. gin里获取http请求过来的参数
  6. vue3的新特性
  7. Get the parameters from HTTP request in gin
  8. New features of vue3
  9. vue-cli 引入腾讯地图(最新 api,rocketmq原理面试
  10. Vue 学习笔记(3,免费Java高级工程师学习资源
  11. Vue 学习笔记(2,Java编程视频教程
  12. Vue cli introduces Tencent maps (the latest API, rocketmq)
  13. Vue learning notes (3, free Java senior engineer learning resources)
  14. Vue learning notes (2, Java programming video tutorial)
  15. 【Vue】—props属性
  16. 【Vue】—创建组件
  17. [Vue] - props attribute
  18. [Vue] - create component
  19. 浅谈vue响应式原理及发布订阅模式和观察者模式
  20. On Vue responsive principle, publish subscribe mode and observer mode
  21. 浅谈vue响应式原理及发布订阅模式和观察者模式
  22. On Vue responsive principle, publish subscribe mode and observer mode
  23. Xiaobai can understand it. It only takes 4 steps to solve the problem of Vue keep alive cache component
  24. Publish, subscribe and observer of design patterns
  25. Summary of common content added in ES6 + (II)
  26. No.8 Vue element admin learning (III) vuex learning and login method analysis
  27. Write a mini webpack project construction tool
  28. Shopping cart (front-end static page preparation)
  29. Introduction to the fluent platform
  30. Webpack5 cache
  31. The difference between drop-down box select option and datalist
  32. CSS review (III)
  33. Node.js学习笔记【七】
  34. Node.js learning notes [VII]
  35. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  36. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  37. 【JQuery框架,Java编程教程视频下载
  38. [jQuery framework, Java programming tutorial video download
  39. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  40. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  41. 【Vue,阿里P8大佬亲自教你
  42. 【Vue基础知识总结 5,字节跳动算法工程师面试经验
  43. [Vue, Ali P8 teaches you personally
  44. [Vue basic knowledge summary 5. Interview experience of byte beating Algorithm Engineer
  45. 【问题记录】- 谷歌浏览器 Html生成PDF
  46. [problem record] - PDF generated by Google browser HTML
  47. 【问题记录】- 谷歌浏览器 Html生成PDF
  48. [problem record] - PDF generated by Google browser HTML
  49. 【JavaScript】查漏补缺 —数组中reduce()方法
  50. [JavaScript] leak checking and defect filling - reduce() method in array
  51. 【重识 HTML (3),350道Java面试真题分享
  52. 【重识 HTML (2),Java并发编程必会的多线程你竟然还不会
  53. 【重识 HTML (1),二本Java小菜鸟4面字节跳动被秒成渣渣
  54. [re recognize HTML (3) and share 350 real Java interview questions
  55. [re recognize HTML (2). Multithreading is a must for Java Concurrent Programming. How dare you not
  56. [re recognize HTML (1), two Java rookies' 4-sided bytes beat and become slag in seconds
  57. 【重识 HTML ,nginx面试题阿里
  58. 【重识 HTML (4),ELK原来这么简单
  59. [re recognize HTML, nginx interview questions]
  60. [re recognize HTML (4). Elk is so simple