el-form表单验证的一些实用方法总结

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" 
class="demo-ruleForm">
    <el-form-item label="活动名称" prop="name"> 
        <el-input v-model="ruleForm.name"></el-input> 
    </el-form-item>
<el-form>

data(){
    return {
        ruleForm: { name: '' },
        rules: {
            name: [ 
                { required: true, message: '请输入活动名称', trigger: 'blur' }, 
                { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' } 
            ]
        }
    }
},

data() {
 const userValidator = (rule, value, callback) => {
    if (value.length > 3) {
      callback()
    } else {
      callback(new Error('用户名长度必须大于3'))
    }
  }
  return {}
}
rules: {
      user: [
        { validator: userValidator, trigger: 'change' }
      ]
    }

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" 
class="demo-ruleForm">
    <el-form-item label="活动名称"> 
        <el-input v-model="ruleForm.name"></el-input>
        <el-form-item prop="info.name"> 
            <el-input v-model="ruleForm1.info.name"></el-input>

        </el-form-item>
    </el-form-item>
<el-form>

data(){
    return {
           ruleForm: {
                info: {
                    name: ''
                }
            },
    }
}

rules里面同样也可以这样写

rules: {
      info: {
          name: [{ required: true, message: '请选择', trigger: 'change' }],
      }
    }

<el-form-item prop="email" label="邮箱" :rules="[ { required: true, message: '请输入邮箱地址', trigger: 'blur' }, { type: 'email', message: '请输入正确的邮箱地址', trigger: ['blur', 'change'] } ]" > <el-input v-model="dynamicValidateForm.email"></el-input> </el-form-item>

const message =
      this.type === 'addFirst'
        ? '请输入一级名称'
        : this.type === 'addChild'
        ? '请输入二级名称'
        : this.type === 'addThree' && this.editChannelItem
        ? '请选择三级名称'
        : '请输入三级名称';
    const validatorHandle = (rule, value, callback) => {
      if (value) {
        callback();
      } else {
        callback(new Error(message));
      }
    };
    const newRule = [...this.formInfoRules.name, { validator: validatorHandle, trigger: 'blur' }];
    this.formInfoRules = Object.assign({}, this.formInfoRules, { name: newRule });

<el-form-item
           
                :error="validateFormState.error"
                :validate-status="validateFormState.state"
              >
            </el-form-item>
            
  validateFormState = {
    periodSendDateError: '',
    periodSendDateStatus: 'success',
  };
  在验证成功或者失败的时候去手动控制error和validate-status的值即可。