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
/** * 生成UUID * @param withSeparator 是否有分割符 * @returns {string} */ export function generateUUID(withSeparator = true) { let d = new Date().getTime() if (window.performance && typeof window.performance.now === 'function') { d += performance.now() } const tpl = withSeparator ? 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' : 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx' return tpl.replace(/[xy]/g, function(c) { const r = (d + Math.random() * 16) % 16 | 0 d = Math.floor(d / 16) return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16) }) }
创建一个generate-uuid/index.js自定义指令文件
import { generateUUID } from '@/utils' const generateUuid = { inserted(el, binding) { const { value } = binding if (!value) { const hasUUID = generateUUID(value) el.setAttribute('data-uuid', hasUUID) if (!hasUUID) { el.parentNode && el.parentNode.removeChild(el) } } } } generateUuid.install = function(Vue) { Vue.directive('generate-uuid', generateUuid) } export default generateUuid
main.js引入
import GenerateUUID from '@/directive/generate-uuid' Vue.use(GenerateUUID)
页面使用
<el-table v-generate-uuid="false" >
使用uuid元素方法
const topRow = this.$refs.multipleTable const hash = topRow.$el.dataset.uuid const tableHeader = document.querySelector(`.el-table[data-uuid="${hash}"] .el-table__header-wrapper`) if (tableHeader) { tableHeader.style.width = topRow.$el.getBoundingClientRect().width + 'px' }
总结
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