What is the reason behind the inability to attach a computed property as inline style in this particular Vue 3 application?

Question

What is the reason behind the inability to attach a computed property as inline style in this particular Vue 3 application?

I'm currently developing a Vue 3 audio player integration with the Napster API.

Project specifics

The player features a progress bar where I utilize the trackProgress computed property for real-time progress updates:

<div class="progress-bar">
   <span :style="{ width: trackProgress + '%' }"></span>
 </div>

...

The challenge

I have encountered an issue where the style is not properly applied to the span element within the progress-bar.

What am I overlooking?

UPDATE

Although using setInterval in the created hook functions, I seek an alternative method. Any suggestions?

this.player.addEventListener("loadedmetadata", () => {
  setInterval(() => {
    this.trackProgress =
      (this.player.currentTime / this.player.duration) * 100;
  }, 100);
});

Any improved solutions?

javascript vue.js vuejs3

Answer 1

Answer №1

Here is a breakdown of the process used to find the solution:

Create a listener for when the player's timeupdate event occurs
Update the component's data whenever the timeupdate event happens
Utilize a computed property called percentageProgress to determine the progress and display it in the template. (You could continue using the trackProgress property, but percentageProgress might be more clear semantically.)

To implement this solution:

data() {
  return {
    player: new Audio(),
    trackCount: 0,
    tracks: [],
    muted: false,
    isPlaying: false,
    currentTime: 0
  };
},

computed: {
  percentageProgress() {
    return (this.currentTime / this.player.duration) * 100;
  }
}

created() {
  this.player.addEventListener("timeupdate", () => {
    this.currentTime = this.player.currentTime;
  });
}

Additionally, keep in mind that computed getters must always return a value. Your current computed property does not currently return anything.

Answer 2

Here is a breakdown of the process used to find the solution:

Create a listener for when the player's timeupdate event occurs
Update the component's data whenever the timeupdate event happens
Utilize a computed property called percentageProgress to determine the progress and display it in the template. (You could continue using the trackProgress property, but percentageProgress might be more clear semantically.)

To implement this solution:

data() {
  return {
    player: new Audio(),
    trackCount: 0,
    tracks: [],
    muted: false,
    isPlaying: false,
    currentTime: 0
  };
},

computed: {
  percentageProgress() {
    return (this.currentTime / this.player.duration) * 100;
  }
}

created() {
  this.player.addEventListener("timeupdate", () => {
    this.currentTime = this.player.currentTime;
  });
}

Additionally, keep in mind that computed getters must always return a value. Your current computed property does not currently return anything.

Answer 3

Answer №2

It is recommended to establish a data property called trackProgress and modify it within the listener that you generate in the created() hook, similar to how you handle the ended event.

Answer 4

It is recommended to establish a data property called trackProgress and modify it within the listener that you generate in the created() hook, similar to how you handle the ended event.

Answer 5

Answer №3

Your approach of continuously adding event listeners within a computed property seems counterproductive.

Although these listeners fetch the desired value, they seem to be lost in the digital void as no action is taken on the returned value when the event triggers.

Instead of using a computed property, consider integrating a trackProgress property into your data() model and move the event listener addition to the mounted section to ensure it is only added once.

This listener will then update the trackProgress property in your model.

data() { return {
  player: new Audio(),
  trackCount: 0,
  tracks: [],
  muted: false,
  isPlaying: false,
  trackProgress: 0,
} }

and

mounted: function () {
  this.player.addEventListener("timeupdate", () => {
    this.trackProgress = (this.player.currentTime / this.player.duration) * 100;
  });
}

Answer 6

Your approach of continuously adding event listeners within a computed property seems counterproductive.

Although these listeners fetch the desired value, they seem to be lost in the digital void as no action is taken on the returned value when the event triggers.

Instead of using a computed property, consider integrating a trackProgress property into your data() model and move the event listener addition to the mounted section to ensure it is only added once.

This listener will then update the trackProgress property in your model.

data() { return {
  player: new Audio(),
  trackCount: 0,
  tracks: [],
  muted: false,
  isPlaying: false,
  trackProgress: 0,
} }

and

mounted: function () {
  this.player.addEventListener("timeupdate", () => {
    this.trackProgress = (this.player.currentTime / this.player.duration) * 100;
  });
}

What is the reason behind the inability to attach a computed property as inline style in this particular Vue 3 application?

Project specifics

The challenge

What am I overlooking?

UPDATE

Any improved solutions?

Answer №1

Answer №2

Answer №3

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