Vue advanced: Adaptability of element UI configurable table component (horizontal scroll bar)

No Silver Bullet 2020-11-13 07:29:21
vue advanced adaptability element ui


In the process of developing front-end projects , Address fit 、 Compatibility issues are a common and laborious chore , Especially in the development Vue project , Application deployment in IE( In especial IE9) Last time .

In the dynamic display ( According to the header returned in the background 、 Table data display ) When searching for results , You will encounter search results that fit the screen width or height , But there will be vertical or horizontal scroll bar phenomenon , adopt F12 Debug page elements , Dynamic additions and deletions will be found overflow:auto Element attributes , Will solve the above problems . Thus we can see that , When rendering page elements dynamically , Before the page loads , Since the page element has not been fully loaded, the end of the calculation element attribute value , It will cause screen mismatch , The problem of horizontal and vertical scrollbars will appear , Now the solution is to add and delete through simulation overflow:auto Element attributes , To recalculate the element attribute values for screen adaptation .

Form dislocation

  • Problem description :
    When the operation field in the table is on the right side of the table , It will be found that the data column and the operation column are misplaced in the process of scrolling up and down .

  • Problem analysis :
    For this question , By viewing the element properties , You will find that it is due to the border What is the width .

  • Solution :
    By eliminating redundant elements border Width , That is to cancel the element border( Be careful : Header and td All need to include ), It can solve the above problems .
    Similar writing is as follows :

.ele .el-table__row td:nth-last-child(1), .ele el-table__header-wrapper th:nth-last-child(1) {
border-right:none;
}
.ele .el-table__row td:nth-last-child(2), .ele el-table__header-wrapper th:nth-last-child(2) {
border-right:none;
}

Horizontal scroll bar

  • Problem description :
    When the operation field in the table is on the left side of the table , It will be found that the data column and the operation column are misplaced in the process of scrolling up and down .

  • Problem analysis :
    For this question , By viewing the element properties , You will find that it is caused by the horizontal scroll bar on the page .

  • Solution :
    By eliminating the horizontal scroll bar , It can solve the above problems .

Through the network query solution is as follows :

  • Scheme 1 : Try to modify the data after rendering so that table Repaint
    In the updated Hook update columns data ( A layer of conversion is needed in the middle , Direct modification is prohibited props), but table It seems that the data will not be bound Bi directionally , therefore table There was no change , It doesn't trigger the second width calculation .

  • Option two : Try to set the 2px Of border Get rid of
    Debug found in browser .el-table About border after , It can solve the problem of scrollbar caused by content overflow ; The specific way is to updated 1s Later el-table Bind one class, Remove border, But remove border after , Reduced page Aesthetics .

  • Option three : Hand over width calculation to browser
    Debugging through browser , Findings will be .el-table__body-wrapper Of overflow Properties hidden and redisplayed , The horizontal scroll bar will not appear , It should be re added overflow: auto; It makes the browser itself recalculate table Width , So if the width is enough, there is no need to display the horizontal scroll bar ;

specific working means :

<!-- template -->
<el-table ref="configurationTable" border :data="data" :height="height" v-loading="isLoading" :class="['configurationTable', {afterRenderClass: showAfterRenderClass}]">
<!-- xxx -->
</el-table>
// script
data () {
return {
showAfterRenderClass: false
}
},
updated () {
/**
* Used to show unnecessary when hiding fixed height scrollX Timer for
* This is a el-table Width calculated on initial rendering bug, After rendering, you can use the overflow: auto adjustment
*/
const handleScrollX = setInterval(() => {
// Check whether it has been generated table node , If not, every 0.5s Test once
// Only when a real node is generated can it be modified overflow Property lets the browser recalculate
if (this.$refs.configurationTable) {
this.showAfterRenderClass = true
clearInterval(handleScrollX)
}
}, 500)
}
/* style ( Be careful not to set to scoped) */
/** configurationTable and afterRenderClass It's all to mark changes within this component only */
.configurationTable .el-table__body-wrapper {
overflow: hidden;
}
.afterRenderClass {
.el-table__body-wrapper {
overflow: auto;
}
}

Through project practice , It is found that scheme 3 is feasible , But it needs to be transformed properly .

Scheme 3 is suitable for page data display , When the table data display function is extracted into component form , When adding or deleting page data , The horizontal scroll bar appears , This leads to the recurrence of table dislocation , According to the parent-child component communication process , You can pass a random number from a parent component to a child component , When the sub component table data change is detected , The parent component passes the random number to the child component , This tells the subcomponents that the table data has changed , Page elements need to be recalculated , The specific code is as follows :

watch: {
initnumer (val) {
if (val === 0) return
this.showAfterRenderClass = false
}
}
版权声明
本文为[No Silver Bullet]所创,转载请带上原文链接,感谢

  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