vue中的rules表单校验规则使用方法示例详解 :rules=“rules“

<el-form
  ref="dataForm"     // 必写属性值
  :rules="rules"     // 必写属性值
  :model="userForm"  // 必写属性值
  label-position="left"
  label-width="100px"
>
  <el-row>
    <el-col :span="12">
      <el-form-item
        label="充值金额"
        prop="amount"  // 必写属性值
      >
        <el-input
          v-model="userForm.amount"  // 必写属性值
          placeholder="请输入充值金额"
        ></el-input>
      </el-form-item>
    </el-col>
  </el-row> 
</el-form>
<div slot="footer" class="dialog-footer" align="center">
  <el-button @click="dialogFormVisible = false">返回</el-button>
  <el-button type="primary" @click="Recharge()" >
    提交
  </el-button>
</div>

Recharge() {
  this.$refs['dataForm'].validate((valid) => {
    if (valid) {
      // 校验通过、调充值接口的逻辑操作
  }
})

data() {
  return { 
    rules: {
      amount: [
        { required: true, message: '充值金额不能为空', trigger: 'blur' },
        {
          pattern: /^\d+(\.\d{1,1})?$/,
          message: '金额为数字类型且最多保留1位小数',
          trigger: 'blur',
        },
      ],
    },
  }
},

data() {
  return {
    userForm: {
      amount: '',
    }, 
  }
},

 this.dialogFormVisible = true
 this.$nextTick(() => {
   this.$refs['dataForm'].clearValidate()
 })