double question mark javascript
//Similar to || but only returns the right-hand operand if the left-hand is null or undefined
0 ?? "other" // 0
false ?? "other" // false
null ?? "other" // "other"
undefined ?? "other" // "other"
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const foo = null ?? 'default string';
console.log(foo);
// expected output: "default string"
const baz = 0 ?? 42;
console.log(baz);
// expected output: 0
Thank you!
1
4
(1 Votes)
0
3.89
9
let a = null;
const b = a ?? -1; // Same as b = ( a != null ? a : -1 );
console.log(b); // output: -1
//OR IF
let a = 9;
const b = a ?? -1;
console.log(b); // output: 9
//PS.,VERY CLOSE TO '||' OPERATION IN FUNCTION, BY NOT THE SAME
Thank you!
9
3.89
(9 Votes)
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