Vue.js - experiencing issues with conditional styling not functioning as expected

Can someone help me with an issue I'm having? I've created a button with a heart symbol that is supposed to change color when clicked, but it's not working as expected.

This is my current code:

 <template>
    
     <button v-bind:class="classes" type="submit" @click="toggle">
            <span v-text="this.count"></span>
            <i class="fas fa-heart fa-sm" v-bind:style="styleObject"></i>
    </button>
        
    </template>
    
    
    <script>
    export default {
        props: ['reply'],
    
        data(){
            return {
                isFavorited: this.reply.isFavorited,
                count: this.reply.favorites_count
            }
        },
    
        computed: {
            classes(){
                return ['btn',this.isFavorited ? 'btn-primary':'btn-secondary'];
            },
            styleObject(){
                return this.isFavorited ? 'color:red':'color:white';
            } 
        },
    .......
methods: {
        toggle(){
            // check if reply is favorited
            if(this.isFavorited){
                axios.delete('/replies/'+this.reply.id+'/favorites');
                this.isFavorited = false;
                this.count--;
            }else{
                 axios.post('/replies/'+this.reply.id+'/favorites');
                this.isFavorited = true;
                this.count++;
            }
        }
    }  

When using the inline style binding or the styleObject, the color doesn't change unless I refresh the page. The button class works fine though.

I have also tried other methods like:

 <span class="fas fa-heart fa-sm" v-bind:style="[this.isFavorited ? {'color' : 'red'} : {'color' : 'white'}]"></span>

and this way:

 styleObject(){
             return { color: this.isFavorited ? 'red' : 'white' };
        } 

The Vue dev tool shows that the color has changed upon clicking, but it's not reflecting on the screen. Any suggestions on how to fix this?

Answer №1

When working with Vue, the styleObject function should always return an object. This is because the style attribute in Vue requires either an object or array syntax for proper binding.

styleObject() {
  return this.isFavorited ? { color: 'red' } : { color: 'white' };
}

A more concise solution was provided by @Terry:

styleObject() {
  return { color: this.isFavorited ? 'red' : 'white' };
}

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