Unable to style Backbone View with CSS

Recently started diving into the world of Backbone, and it seems like I might be missing a key concept here.

In my View object, there's a snippet of code that's puzzling me...

  1. First off, I can't figure out why the CSS change in the highlightHero function isn't taking effect. Even though a

    console.log(this.$el.children(".playerIcon"))
    

    statement reveals that the style has been applied to the element in question, it doesn't reflect on the actual DOM element.

  2. Secondly, if I consciously introduce a syntax error at the end of the highlightHero function, everything miraculously starts working flawlessly, albeit with an exception being thrown as well.

.

initialize: function(){
    this.model.on('change', this.render, this);
    this.model.on('change:isHero', this.highlightHero, this);       
},

events: {
    'click .playerIcon': 'toggleHero'
},

toggleHero: function(){
    this.model.toggleHero();//This simply toggles a boolean value
},

highlightHero: function(){
    if(this.model.get('isHero')==true)
    {
        this.$el.children(".playerIcon").css("background-image", "url('/imgs/user-red.png')");
        console.log(this.$el.children(".playerIcon"))
    }
    else
    {
        this.$el.children(".playerIcon").css("background-image", "url('/imgs/user.png')");
    }
},

Would greatly appreciate any insight or explanation regarding these issues.

Answer №1

After the successful execution of highlightHero following the change:isHero event, a CSS class is applied to reflect the changes in the DOM. However, this effect is short-lived as the change event triggers a View re-render without the CSS styling being retained, happening too quickly for observation. If an syntax error occurs and crashes the application, the change event will not be triggered at all.

To address this issue, I recommend incorporating the call to highlightHero within your render function and removing the change:isHero event listener.

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