element UI 字段必填校验默认提示文字 ‘%s is required‘ 修改为自定义中文 “该项为必填项“

目标

element UI 字段必填校验默认英文提示 ‘%s is required’ 修改为自定义中文 “该项为必填项”

方法（修改代码为）

import Schema from 'async-validator'
// 设置报错提示信息
Schema.messages.required = fieldName => {
  return '该项为必填项'
}

说明

1. 上面的代码修改了 async-validator 库中默认的必填项报错提示信息
2. 上面的代码建议放在 main.js 内（或其他必定被前置执行的JS文件中，可以自行判断）
3. 其他的校验提示信息也可以自定义，如正则匹配 ( 'async-validator/lib/messages.js' 文件中所有的提示信息，默认提示信息展示如下,都可以修改替换 )

 Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.newMessages = newMessages;
function newMessages() {
  return {
    'default': 'Validation error on field %s',
    required: '%s is required',
    'enum': '%s must be one of %s',
    whitespace: '%s cannot be empty',
    date: {
      format: '%s date %s is invalid for format %s',
      parse: '%s date could not be parsed, %s is invalid ',
      invalid: '%s date %s is invalid'
    },
    types: {
      string: '%s is not a %s',
      method: '%s is not a %s (function)',
      array: '%s is not an %s',
      object: '%s is not an %s',
      number: '%s is not a %s',
      date: '%s is not a %s',
      boolean: '%s is not a %s',
      integer: '%s is not an %s',
      float: '%s is not a %s',
      regexp: '%s is not a valid %s',
      email: '%s is not a valid %s',
      url: '%s is not a valid %s',
      hex: '%s is not a valid %s'
    },
    string: {
      len: '%s must be exactly %s characters',
      min: '%s must be at least %s characters',
      max: '%s cannot be longer than %s characters',
      range: '%s must be between %s and %s characters'
    },
    number: {
      len: '%s must equal %s',
      min: '%s cannot be less than %s',
      max: '%s cannot be greater than %s',
      range: '%s must be between %s and %s'
    },
    array: {
      len: '%s must be exactly %s in length',
      min: '%s cannot be less than %s in length',
      max: '%s cannot be greater than %s in length',
      range: '%s must be between %s and %s in length'
    },
    pattern: {
      mismatch: '%s value %s does not match pattern %s'
    },
    clone: function clone() {
      var cloned = JSON.parse(JSON.stringify(this));
      cloned.clone = this.clone;
      return cloned;
    }
  };
}

var messages = exports.messages = newMessages();