change img src based on conditional statement vuejs

Question

I am building a radio button, which use a default image (black-radio.png or white-radio.png without checkmark) when the button is not checked, else they use black-radio-checked.png or white-radio-checked.png. But really stuck with this bug. I know there is an option to use computed property, but how should I solve this?

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var vm = new Vue({
    el: '#colorPicker',
    data: {
        color: 'black',
        colors: [
            {
                name: 'black',
                image: 'images/black-radio.png',
                image_checked: 'images/black-radio-checked.png'
            },
            {
                name: 'white',
                image: 'images/white-radio.png',
                image_checked: 'images/white-radio-checked.png'
            }
        ]
    }
});

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js" type="text/javascript"></script>

<div id="colorPicker">				
<div class="display-inline-block">
    <label :for="colorInfo.name" v-for="(colorInfo, index) in colors">
      <input type="radio" name="color" v-model="color" :id="colorInfo.name" class="wireless-headphone-new-input" :value="colorInfo.name"/>
      <img :src="'images/' + colorInfo.name + '-radio.png'">
    </label>
  <div class="confirmation-color capitalize">{{ color }}  </div>
</div>
</div>

What do you mean by conditional statement? do you want to show image based on selected checkbox? — Helping hand
– Helping hand, Commented Aug 24, 2018 at 15:51

Helping hand · Accepted Answer · 2018-08-24 16:56:29Z

1

Whenever a radio button is checked, this.color value is updated.
So a v-if check on color==colorInfo.name to show image_checked field for the selected radio button and v-else to show rest other buttons with image field will do the trick.

var vm = new Vue({
    el: '#colorPicker',
    data: {
        color: '',
        colors: [
            {
                name: 'black',
                image: 'images/black-radio.png',
                image_checked: 'images/black-radio-checked.png'
            },
            {
                name: 'white',
                image: 'images/white-radio.png',
                image_checked: 'images/white-radio-checked.png'
            }
        ]
    }
    
});

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js" type="text/javascript"></script>

<div id="colorPicker">				
<div class="display-inline-block">
    <label :for="colorInfo.name" v-for="(colorInfo, index) in colors">
      <input type="radio" name="color" v-model="color" :id="colorInfo.name" class="wireless-headphone-new-input" :value="colorInfo.name"/>
      <img v-if="color==colorInfo.name" :src="colorInfo.image_checked">
      <img v-else :src="colorInfo.image"/>
    </label>
  <div class="confirmation-color capitalize">{{ color }}  </div>
  
</div>
</div>

edited Aug 24, 2018 at 16:56

answered Aug 24, 2018 at 15:56

Helping hand

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12 Comments

Frontend employee Over a year ago

Thanks, but how do I add interpolation to img src in vue? and there should be an if else statement or something like that....to check which image they should show (because you have a white-radio.png and white-radio-checked.png)

Helping hand Over a year ago

what interpolation do you want to add

Frontend employee Over a year ago

You should look at this part--> <img :src="'images/' + colorInfo.name + '-radio.png'"> . I think it is not possible to add interpolation to an img src attribute like this--> <img :src="{{curentImgUrl}}/>....but this should also first check if the input is checked, if not then use black-radio.png else black-radio-checked.png.

Helping hand Over a year ago

it is possible, you can do <img :src=currentImgUrl />

Frontend employee Over a year ago

Ok and how do i check if an input is checked or not....if checked -> black-radio.png else black-radio-checked.png...

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