Display and conceal HTML elements depending on a condition without utilizing a div tag

I'm currently developing an Angular JS project that features three radio buttons. The code snippet is displayed below:

    <div class="sys-form__field" 
     layout="row">
  <label class="sys-label sys-label--radio" flex flex-gt-xs="33">Choices</label>

  <input type="radio"
          ng-model="booking.model.foodType"
          value="vegetarian"
          class="sys-input sys-input__radio"
          title="" />
  <md-button ng-click="booking.setRadio('foodType', 'vegetarian')">Vegetarian</md-button>
  <input type="radio"
          ng-model="booking.model.foodType"
          value="vegan"
          class="sys-input sys-input__radio"
          title="" />
  <md-button ng-click="booking.setRadio('foodType', 'vegan')">Vegan</md-button>
  <input type="radio"
          ng-model="booking.model.foodType"
          value="nonvegetarian"
          class="sys-input sys-input__radio"
          title="" />
  <md-button ng-click="booking.setRadio('foodType', 'nonvegetarian')">Non Vege</md-button>
</div>

The user's food choices determine the display of additional radio button sets. Here is the HTML for these radio buttons:

<div class="sys-form__field"  ng-show="booking.foodSizeChoice()"
 layout="row">

<input type="radio"
        ng-model="booking.model.foodSize"
        value="small"
        title="" > Small

<input type="radio"
        ng-model="booking.model.foodSize"
        value="medium"
        title="" > Medium           

<input type="radio"
        ng-model="booking.model.foodSize"
        value="large"
        title="" > Large    

If the user selects vegetarian, only the small radio button should be displayed. If non-vegetarian is selected, both small and medium buttons should appear. How can I achieve this dynamic behavior?

Currently, my attempted solution looks like this:

  this.foodTypeChoice = () => {
 const check2 = () => this.model.binType == 'small';

return check2(); }

However, all the radio buttons are still being shown. Any assistance would be greatly appreciated.

Answer №1

Could you attempt something along these lines?

 <input  type="radio"
        ng-model="booking.model.foodSize"
        value="small"
        title=""
        ng-show="booking.model.foodType == 'vegetarian'"> Small

<input  type="radio"
        ng-model="booking.model.foodSize"
        value="medium"
        title="" 
        ng-show="booking.model.foodType == 'nonvegetarian'"> Medium           

<input  type="radio"
        ng-model="booking.model.foodSize"
        value="large"
        title="" 
        ng-show="booking.model.foodType == 'nonvegetarian'"> Large

Answer №2

It is advisable to avoid placing functions within show/hide/if directives as it can decrease application performance; instead, utilize logical statements or boolean variables. Show/hide statements can be directly applied to inputs

<input
  ng-show="booking.model.foodType === 'vegetarian' || booking.model.foodType === 'nonvegetarian'"
  type="radio"
  ng-model="booking.model.foodSize"
  value="small"
  title=""> Small

<input
  ng-show="booking.model.foodType === 'nonvegetarian'"
  type="radio"
  ng-model="booking.model.foodSize"
  value="medium"
  title=""> Medium

<input
  type="radio"
  ng-model="booking.model.foodSize"
  value="large"
  title=""> Large

In addition, consider using extra variables to store statements and update them when the user clicks on buttons to change food type

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