How to properly unload/destroy a VIDEO element
Let's get this unloading party started and dispose of a VIDEO element:
- Pause the action:
video.pause(). - Unplug the source:
video.src = ''. - Reload:
video.load(). - Cut off the event listeners:
video.removeEventListener('type', handler). - Evict it from the DOM:
video.parentNode.removeChild(video).
This ensures the video is stopped, disconnected, and removed in an organized manner.
Pre-flight checklist
Before unloading or destroying a VIDEO element, it's important to understand the stakes. Memory leaks are very 2021, but let's bring in 2022 with better performance and a proper methodology.
Load()/unload() significance
Contrary to popular belief, removing the VIDEO element from the DOM does not clear the buffer, or stop network activity. The load() function after setting src to an empty string actually informs the browser to abort fetching any media data and release its hold on the former media data. Like a much-needed break-up in a stale, resource-consuming relationship.
Detach those event listeners
Attached event listeners that aren't properly removed can cause memory leaks. Poor thing can't leave if you're still holding onto them!
Anticipate browser-specific quirks
Different browsers handle unloading a tad bit differently. Each one is unique, just like us! Kindly show them some respect and test your method in a variety of environments.
Deep dive into tactics
Swatting the bugs
Starting the offloading process by pausing the video and resetting the source address ensures we've got everything under control before the dismantling begins.
Keep the browser happy
Failing to unload a video element properly can result in a crashed browser. Rest assured, no one wants that. Always ensure there are no active tasks or listeners before proceeding to remove the video from the DOM.
Turn off autoload and preloading
A bit of a heads-up, the autoplay or preload attributes can be tricky. Best to disable these babies right before you unload to prevent any remaining network activity and buffering.
Advanced tips and tricks
The delete operator
In JavaScript, the delete operator doesn’t serve the purpose of unloading a VIDEO element because it simply removes properties from objects. The contrast might be a little subtle, but it’s there. Just like the difference between fat-free and sugar-free.
Observing events for insights
Harness the power of the error and loadstart events. They can be a great source of information about your video loading process.
jQuery to the rescue
For those that swear by jQuery, its empty() method brilliantly clears container elements efficiently, especially if your VIDEO element is nested within a larger DOM structure.
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