If you are a developer working with HTML5 video or audio players, you may have come across the error message "Uncaught (in Promise) DOMException: The play() request was interrupted by a call to pause()." This error can be frustrating and may cause your media player to stop working altogether.
In this guide, we will explore the causes of this error message and provide step-by-step solutions to help you troubleshoot and fix the issue.
What Causes the 'Uncaught (in Promise) DOMException' Error Message?
The 'Uncaught (in Promise) DOMException' error message occurs when the play() function of the HTML5 media player is interrupted by a call to pause(). This can happen for several reasons, including:
- The user clicked the pause button before the media player finished loading
- The media player was paused before the play() function was called
- The media player was paused before the media file finished loading
How to Fix the 'Uncaught (in Promise) DOMException' Error Message
Step 1: Check if the Media File is Loaded Correctly
The first step in troubleshooting the 'Uncaught (in Promise) DOMException' error message is to check if the media file is loaded correctly. If the media file is not loaded correctly, the play() function may be interrupted by a call to pause(), resulting in the error message.
To check if the media file is loaded correctly, you can use the readyState property of the HTMLMediaElement object. The readyState property returns the current state of the media file, and a value of 4 indicates that the media file has finished loading.
Here's an example code snippet:
const video = document.getElementById('video');
if (video.readyState === 4) {
video.play();
} else {
video.addEventListener('loadedmetadata', () => {
video.play();
});
}
The code snippet checks if the media file is loaded (readyState === 4) and calls the play() function if it is. If the media file is not loaded, the code snippet waits for the loadedmetadata event to be fired before calling the play() function.
Step 2: Check if the Media Player is Paused
The second step in troubleshooting the 'Uncaught (in Promise) DOMException' error message is to check if the media player is paused before the play() function is called. If the media player is paused, the play() function may be interrupted by a call to pause(), resulting in the error message.
To check if the media player is paused, you can use the paused property of the HTMLMediaElement object. The paused property returns a boolean value indicating whether the media player is paused.
Here's an example code snippet:
const video = document.getElementById('video');
if (video.paused) {
video.play();
}
The code snippet checks if the media player is paused (paused === true) and calls the play() function if it is.
Step 3: Check if the Pause Button is Clicked
The third step in troubleshooting the 'Uncaught (in Promise) DOMException' error message is to check if the pause button is clicked before the media player finished loading. If the pause button is clicked before the media player finished loading, the play() function may be interrupted by a call to pause(), resulting in the error message.
To check if the pause button is clicked, you can use the play() function's returned promise. The promise is resolved when the media starts playing and rejected if the media fails to play.
Here's an example code snippet:
const video = document.getElementById('video');
video.play()
.then(() => {
console.log('Media playback started successfully');
})
.catch(() => {
console.log('Media playback failed');
});
The code snippet calls the play() function and logs a message to the console when the media starts playing successfully or fails to play.
FAQ
Q1. How do I prevent the 'Uncaught (in Promise) DOMException' error message from occurring?
To prevent the 'Uncaught (in Promise) DOMException' error message from occurring, you can use the solutions provided in this guide. Check if the media file is loaded correctly, if the media player is paused, and if the pause button is clicked before the media player finished loading.
Q2. Why does the 'Uncaught (in Promise) DOMException' error message occur?
The 'Uncaught (in Promise) DOMException' error message occurs when the play() function of the HTML5 media player is interrupted by a call to pause(). This can happen for several reasons, including the user clicking the pause button before the media player finished loading, the media player being paused before the play() function was called, or the media player being paused before the media file finished loading.
Q3. How do I check if the media file is loaded correctly?
You can use the readyState property of the HTMLMediaElement object to check if the media file is loaded correctly. The readyState property returns the current state of the media file, and a value of 4 indicates that the media file has finished loading.
Q4. How do I check if the media player is paused?
You can use the paused property of the HTMLMediaElement object to check if the media player is paused. The paused property returns a boolean value indicating whether the media player is paused.
Q5. How do I check if the pause button is clicked?
You can use the play() function's returned promise to check if the pause button is clicked. The promise is resolved when the media starts playing and rejected if the media fails to play.