nullish coalescing js
The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operandnullish coalescing js
The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operandnullish coalesing
Expression:
Left ?? Right
if left is null or undefined , then Right will be the value
const a = '' ;
const b = undefined;
const c = a ?? 'default' ; // will give c =''
const d = b ?? 'default' ; // wil give d = 'default'logical nullish operator javascript
function config(options) {
options.duration ??= 100;
options.speed ??= 25;
return options;
}
config({ duration: 125 }); // { duration: 125, speed: 25 }
config({}); // { duration: 100, speed: 25 }Copyright © 2021 Codeinu
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