vue 自定指令生成uuid滚动监听达到tab表格吸顶效果的代码

utils/index,.js

1. /**
2. * 生成UUID
3. * @param withSeparator 是否有分割符
4. * @returns {string}
5. */
6. export function generateUUID(withSeparator = true) {
7. let d = new Date().getTime()
8. if (window.performance && typeof window.performance.now === 'function') {
9. d += performance.now()
10. }
11. const tpl = withSeparator ? 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' : 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'
12. return tpl.replace(/[xy]/g, function(c) {
13. const r = (d + Math.random() * 16) % 16 | 0
14. d = Math.floor(d / 16)
15. return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16)
16. })
17. }

创建一个generate-uuid/index.js自定义指令文件

1. import { generateUUID } from '@/utils'
2. const generateUuid = {
3. inserted(el, binding) {
4. const { value } = binding
5. if (!value) {
6. const hasUUID = generateUUID(value)
7. el.setAttribute('data-uuid', hasUUID)
8. if (!hasUUID) {
9. el.parentNode && el.parentNode.removeChild(el)
10. }
11. }
12. }
13. }
14. generateUuid.install = function(Vue) {
15. Vue.directive('generate-uuid', generateUuid)
16. }
17.  
18. export default generateUuid

main.js引入

1. import GenerateUUID from '@/directive/generate-uuid'
2. Vue.use(GenerateUUID)

页面使用

1. <el-table
2. v-generate-uuid="false"
3. >

使用uuid元素方法

1. const topRow = this.$refs.multipleTable
2. const hash = topRow.$el.dataset.uuid
3. const tableHeader = document.querySelector(`.el-table[data-uuid="${hash}"] .el-table__header-wrapper`)
4. if (tableHeader) {
5. tableHeader.style.width = topRow.$el.getBoundingClientRect().width + 'px'
6. }

总结

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原文链接：https://blog.csdn.net/qq_40190624/article/details/108615131