Logical Nullish Assignment (??=)
Description
The Logical Nullish Operator (??=) returns the right-side operand when the left-side operand is null or undefined. Otherwise it returns the left-side operand.
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Browser Support
??=
is a JavaScript 2020 feature.
ES 2020 is supported in all modern browsers since September 2020:
Chrome 85 |
Edge 85 |
Firefox 79 |
Safari 14 |
Opera 71 |
Aug 2020 | Aug 2020 | Mar 2020 | Sep 2020 | Sep 2020 |