"typescript make function argument optional" Code Answer's
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typescript optional parameters
// Optional Parameters
sayHello(hello?: string) {
console.log(hello);
}
sayHello(); // Prints 'undefined'
sayHello('world'); // Prints 'world'
Source: medium.com
types function typescript
interface Param {
title: string;
callback: function;
}
Source: stackoverflow.com
typescript make function argument optional
function multiply(a: number, b: number, c?: number): number {
if (typeof c !== 'undefined') {
return a * b * c;
}
return a * b;
}
Source: www.typescripttutorial.net
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