基于el-input改写的具有show-word-limit显示限制输入长度功能的输入框

文章目录

背景

接手公司以前做的vue项目，是基于element2.3.9搭建的，现在要追加的功能需要在输入框显示限制输入长度，而2.3.9的element是没有show-word-limit功能的，如果升级element版本会导致项目中其他样式存在问题，所以只能自己添加功能代码了，磕磕绊绊终于写出来了~

代码片断

// 组件代码<template><div class="inputWord"><el-input id="inputWord" v-bind="$attrs" v-on="$listeners" :maxlength="maxlength" :value="value" auto-complete="off" @input="changeWord"></el-input><span class="el-input__suffix"><span class="el-input__suffix-inner"><span class="el-input__count"><span class="el-input__count-inner">{{wordLength }}/{{maxlength }}</span></span></span></span></div></template><script>export default {props: {value: {type: String,default: ''},maxlength: {type: Number,default: 0}},data() {return {wordLength: 0,flag: true};},created() {this.wordLength = this.value.length;},methods: {changeWord(val) {this.$nextTick(() => {if (this.flag) {this.wordLength = val.length;}});}},mounted() {// 加这两个函数是为了避免输入中文过程中触发input事件let input = document.getElementById('inputWord');input.addEventListener('compositionstart', () => {this.flag = false;});input.addEventListener('compositionend', () => {this.flag = true;});}};</script><style lang='scss' scoped>.inputWord /deep/{position: relative;.el-input__inner{padding-right: 80px;}}.el-input__suffix{position: absolute;height: 100%;right: 5px;top: 0;text-align: center;color: #c0c4cc;transition: all .3s;pointer-events: none;}.el-input__count {height: 100%;display: inline-flex;align-items: center;color: #909399;font-size: 12px;}.el-input__count-inner {background: #fff;line-height: normal;display: inline-block;padding: 0 5px;}</style>

// 组件的引用// 引用组件，如果全局引用在index.js中全局引用插件import WordLimitInput from 'components/WordLimitInput';ponent('word-limit-input', WordLimitInput);// 页面代码<word-limit-input v-model="questionsData.appName" :maxlength="30"></word-limit-input>

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