/TypeScript/Typescript if undefined default value

Typescript if undefined default value

Assign this value or if it is undefined this other value javascript

var x; //variable to change
var y; //higher priority variable
var z = 12; //lower priority variable
x = !(y === undefined) ? y : z;
console.log(x); //12

Typescript if undefined default value

x ??= default_value

Source: stackoverflow.com

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