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              html(ng-app="myApp")
  body(ng-controller="InputTestController as ctrl")
    .form-wrapper
      form(name="ctrl.form")
        //- legend 输入范围测试
        .input-wrapper
          input(name="budget", ng-model="ctrl.totalBudget", num-range-validate,  min="ctrl.sum")
          i.fa.fa-exclamation.error(ng-show="ctrl.form.budget.$invalid", title="您的预算不得低于已选物品总金额{{ctrl.sum}}")
        ul
          li(ng-repeat="item in ctrl.list") 
            span.fa-stack.check(ng-click="ctrl.selectItem(item)", ng-class="{'selected': item.select, 'disable': ctrl.form.$invalid}")
              i.fa.fa-square.fa-stack-1x
              i.fa.fa-check-square.fa-stack-1x
            | {{item.name}} 价格:{{item.cost}}   
        button(type="button", ng-click="ctrl.submit()", ng-disabled="ctrl.form.$invalid") 确认
            
          
!
            
              $blueColor = #87CEEB
$whiteColor = #fff
$errorColor = #CD5555
$greyColor = #F5F5F5
*
  outline none
.form-wrapper
  width 250px
  margin 20vh auto
  text-align center
  .input-wrapper
    border 1px solid $blueColor
    height 30px
    border-radius 10px
    padding 0px 30px
    position relative
    input
      width 100%
      height 100%
      border none
      box-sizing border-box
      &.ng-invalid:not(.ng-pristine)
        color $errorColor
    .error
      position absolute
      right 10px
      cursor pointer
      top 5px
      color $errorColor
  ul
     text-align left
     list-style none
     .check
       cursor pointer
       .fa-square
         color $greyColor
       .fa-check-square
         color $blueColor
         visibility hidden
       &.selected > .fa-check-square
          visibility visible
       &.disable
          opacity 0.5
          pointer-events none
  button 
    background $blueColor
    color $whiteColor
    width 80px
    border none
    height 30px
    &[disabled]
      opacity 0.5
    
            
          
!
            
              // custome validate directive
function numRangeValidateDirective() {
   return {
        require: 'ngModel',
        scope: {
            min: '=',
            max: '='
        },
        link: (scope, elem, attr, ngModel) => {
            //For DOM -> model validation
            ngModel.$parsers.push((value) => {
                let valid = ((/^-?(0|([1-9]\d*))$/).test(`${value}`));
                const res = _.toNumber(value);
                valid = _.isUndefined(scope.min) ? valid : (valid && (res >= scope.min));
                valid = _.isUndefined(scope.max) ? valid : (valid && (res <= scope.max));
                ngModel.$setValidity('numRange', valid);
                return valid ? res : undefined; // eslint-disable-line no-undefined
            });

            //For model -> DOM validation
            // ngModel.$formatters.unshift((value) => {
            //     // ngModel.$setValidity('budget', blacklist.indexOf(value) === -1);
            //     return value;
            // });
        }
    };
}

class InputTestController {
  constructor() {
    this.list = [
      {name: '羽绒服', cost: 8000},
      {name: '雪地靴', cost: 600},
      {name: 'iPad Pro', cost: 6540},
      {name: '玩具', cost: 100},
      {name: '茶杯', cost: 80}
    ];
    this.totalBudget = 0;
    this.sum = 0;
  }
  
  _getTotalSum() {
    return _.sumBy(_.filter(this.list, ['select', true]), (item) => {return item.cost});
  }
  
  selectItem(item) {
      item.select = !item.select;
      if (item.select) {
        this.totalBudget += item.cost;
      } else {
        this.totalBudget -= item.cost;
      }
     this.sum = this._getTotalSum();
     this._setStatus();
  }
  
  _setStatus() {
    const index = _.findIndex(this.list, ['select', true]);
    if (index == -1) {
      this.totalBudget = 0;
      this.sum =0;
    }
  }
  submit() {
    alert(`您好,你的应付金额是¥${this.totalBudget}`);
  }
}
InputTestController.$inject = [];

angular.module('myApp', [])
  .directive('numRangeValidate', numRangeValidateDirective)
  .controller('InputTestController', InputTestController)
            
          
!
999px
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