elementUI表单校验动态添加校验规则

elementui动态添加校验规则，场景：

如果活动名称为空，则所有字段非必填

如果活动名称不为空，则具体活动名称提示必填

 

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<template>   <div id="app">     <el-form ref="form" :model="form" :rules="rules" label-width="80px">       <el-form-item label="活动名称" prop="name">         <el-input v-model="form.name" @blur="blur()"></el-input>       </el-form-item>       <el-form-item label="具体活动" prop="name1">         <el-input v-model="form.name1"></el-input>       </el-form-item>     </el-form>   </div> </template>   <script> export default {   name: "app",   components: {},   data() {     return {       form: {         name: "",         name1: "",       },       rules: {},     };   },   methods: {     addRules() {       // 定义规则       const newRules = [{ required: true, trigger: "change", message: "具体活动必填" }];       // 给rules对象添加规则       this.rules = { ...this.rules, name1: newRules };     },     removeRules() {         // 清除指定校验规则         this.$refs.form.clearValidate(["name1"]);       // 这行必须       this.rules = { ...this.rules, name1: [] };     },       blur() {       if (this.form.name === "") {         this.removeRules();       } else {         this.addRules();       }     },   }, }; </script>

　　效果：

活动名称为空时，具体活动选项非必填

 

 

 

 

活动名称不为空时，具体活动选项必填