How to Dynamically Change Audio Source in a React.js Class Component with AudioPlayer

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The Problem at Hand

When developing a basic audio playing app, you might have a set of audio tracks stored locally. The challenge here is to create a parent component that can switch between different audio sources using functions within a class component. You might also be unsure of how to properly modify the state to reflect the selected audio track.

Understanding the Solution

To change the audio source of the AudioPlayer dynamically within a React class component, you can introduce an additional piece of state that keeps track of the current audio track being played. This solution will involve the following steps:

Step 1: Setting Up the Initial State

Instead of keeping your tracks in a single array, we will structure the state to include both the track list and an index pointing to the currently selected track. Here’s how to define the state:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Creating the Function to Change Tracks

To switch the audio source based on user selection, we will implement a method that can update the currentTrack state. This method will take an index as an argument, which specifies the track to play.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Updating the Render Method

Within the render method, we will utilize the currentTrack state to dynamically change the audio source of the AudioPlayer. The component will map over the tracks and create a clickable list that, when clicked, will call changeData with the corresponding index.

[[See Video to Reveal this Text or Code Snippet]]

Complete Code Example

Here’s how the entire Player component would look after implementing the changes we discussed:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Feel free to ask questions or share your experiences with similar challenges in the comments below!