浅析JS中什么是自定义react数据验证组件

ko.validation.locale('zh-CN');
ko.validation.rules['money'] = {
 validator: function (val) {  
  if (val === '') return true;  return /^\d+(\.\d{1,2})&＃63;$/.test(val);
 },
 message: '输入的金额不正确'};
ko.validation.rules['moneyNoZero'] = {
 validator: function (val) {  
  if (val === '') return true;  return isNaN(val) || val != 0;
 },
 message: '输入的金额不能为0'};
ko.validation.registerExtenders();var model = {
 MSRP: ko.observable(0),
 price: ko.observable().extend({ required: true, number: true, min: 10000, money: true, moneyNoZero: true }),
 licence_service_fee: ko.observable().extend({ required: true, money: true }),
 purchase_tax: ko.observable().extend({ required: true, money: true }),
 vehicle_tax: ko.observable().extend({ required: true, money: true }),
 insurance: ko.observable().extend({ required: true, money: true }),
 commercial_insurance: ko.observable().extend({ required: true, money: true }),
 mortgage: ko.observable(''),
 interest_discount: ko.observable(''),
 allowance: ko.observable().extend({ money: true }),
 special_spec_fee_explain: ko.observable(''),
 has_extra_fee: ko.observable(false),
 is_new_energy: ko.observable(false)
};
model.extra_fee_explain = ko.observable().extend({
 required: {
  onlyIf: function () {   
   return model.has_extra_fee() === true;
  }
 }
});
model.extra_fee = ko.observable().extend({
 required: {
  onlyIf: function () {   
   return model.has_extra_fee() === true;
  }
 },
 money: {
  onlyIf: function () {   
   return model.has_extra_fee() === true;
  }
 }
});
model.new_energy_allowance_explain = ko.observable().extend({
 required: {
  onlyIf: function () {   
   return model.is_new_energy() === true;
  }
 }
});
model.total_price = ko.computed(function () { 
 var _total = Number(model.price()) + Number(model.licence_service_fee()) +Number(model.purchase_tax()) + Number(model.vehicle_tax()) +Number(model.insurance()) + Number(model.commercial_insurance()); 
  if (model.has_extra_fee()) {
  _total += Number(model.extra_fee());
 } 
 if (model.is_new_energy()) {
  _total -= Number(model.new_energy_allowance());
 } 
 return isNaN(_total) &＃63; '0' : _total.toFixed(2).replace(/(\.0*$)|(0*$)/, '');
});
model.errors = ko.validation.group(model);
ko.applyBindings(model);

class ValidationInputs extends React.Component {
 constructor(props) {
 super(props); this.state = {
  isValid: true,
  required: this.props.required,
  number: this.props.number,
  min: this.props.min,
  max: this.props.max,
  money: this.props.money,
  data: null,
  errors: ""
 }
 }
 componentWillReceiveProps(nextProps) { 
 var that = this; 
 if (this.state.data !== nextProps.data) {  
  return setStateQ({data: nextProps.data}, this).then(function () {  
   return that.handleValidation();
  });
 }
 }
 handleValidation() { var fields = this.state.data; // required validation
 if(this.state.required && isNilOrEmpty(fields)){  
  return setStateQ({errors: '必须填写', isValid: false}, this);
 } 
 // number validation
 if (this.state.number) {  
  if (isNaN(fields)) {  
   return setStateQ({errors: '请输入数字', isValid: false}, this);
  }  
  if (!isNilOrEmpty(this.state.min) && !isNaN(this.state.min) && Number(this.state.min) > Number(fields)) {  
  return setStateQ({errors: '输入值必须大于等于' + this.state.min, isValid: false}, this);
  }  
  if (!isNilOrEmpty(this.state.max) && !isNaN(this.state.max) && Number(this.state.max)  0 && !/^\d+(\.\d{1,2})&＃63;$/.test(fields)) {  
    return setStateQ({errors: '输入的金额不正确', isValid: false}, this);
   }
 } 
  return setStateQ({errors: '', isValid: true}, this);
 }
 render() { return {this.state.errors} }
}

 
净车价：
 

  
  
 
 
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// 父组件调用该方法来判断所有的输入项是否合法
checkInputs() { 
 for (var r in this.refs) {  
   var _ref = this.refs[r];  
   if (_ref instanceof ValidationInputs) {   
    if (!_ref.state.isValid) return false;
  }
 } 
 return true;
}