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Composed lets you create event listeners that automatically get removed after getting invoked. Similar to jQuery's one feature.
Last updated on : 2023-03-20
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
"once" event listener option on IE is not supported on any IE versions.
"once" event listener option on Edge is fully supported on 16-111, and not supported on 12-15 Edge versions.
"once" event listener option on Firefox is fully supported on 50-113, and not supported on 2-49 Firefox versions.
"once" event listener option on Chrome is fully supported on 55-114, and not supported on 4-54 Chrome versions.
"once" event listener option on Safari is fully supported on 10-16.4, and not supported on 3.2-9 Safari versions.
"once" event listener option on Opera is fully supported on 42-95, and not supported on 9.5-41 Opera versions.
"once" event listener option on Safari on iOS is fully supported on 10-16.4, and not supported on 3.2-9 Safari on iOS versions.
"once" event listener option on Android Browser is fully supported on 97-111, and not supported on 2.1-4 Android Browser versions.
"once" event listener option on Opera Mobile is fully supported on 64-73, and not supported on 10-12 Opera Mobile versions.
"once" event listener option on Chrome for Android is fully supported on all Chrome for Android versions.
"once" event listener option on Firefox for Android is fully supported on all Firefox for Android versions.
"once" event listener option on Samsung Internet is fully supported on 6.2-20, and not supported on 4-5 Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:"once" event listener option shows a browser compatibility score of 92. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
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