Ensure that the data prop in Vue is always updated whenever there is a change in

In my Vue.js project, I am creating a data property called w to store the clientWidth of a specific element in my HTML. In the mounted hook, I am initializing it like this:

data() {
 return {
  w: 0,
 };
},
mounted() {
  this.w = this.$refs.timelineProgress.clientWidth;
},

Currently, this code successfully sets this.w to the clientWidth of the element. However, I now want to update the value of w whenever the clientWidth changes. This will allow me to track the resizing of the element based on the screen size or user interactions.

I would appreciate any help or suggestions on how to achieve this dynamic update of the w property. Thank you.

Answer №1

If you're looking to incorporate a window resize event into your component, you might want to consider utilizing the created and unmounted methods.

created() {
    window.addEventListener('resize', this.resizeHandler);
}
unmounted() {
    window.removeEventListener('resize', this.resizeHandler);
}
methods: {
    resizeHandler() {
        this.w = this.$refs.timelineProgress.clientWidth;
    }
}

Furthermore, for improved performance, consider debouncing the state update within the resizeHandler method.

Answer №2

If you want to retrieve dynamic values that depend on other changes within your application, opt for a computed property over using data. For example, if your reference is linked to a Vue component that displays a timeline:

computed:
  {
    width() {
      return this.$refs.timelineProgress.$el.clientWidth
    }
  }

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