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typescript optional parameters

By North BearNorth Bear on Jul 21, 2020
// Optional Parameters
sayHello(hello?: string) {
	console.log(hello);
}

sayHello(); // Prints 'undefined'

sayHello('world'); // Prints 'world'

Source: medium.com

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11

typescript default parameter

By LockenessLockeness on Nov 11, 2020
// Default Parameters
sayHello(hello: string = 'hello') { 
    console.log(hello); 
}

sayHello(); // Prints 'hello'

sayHello('world'); // Prints 'world'

Source: medium.com

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9

typescript optional parameters

By North BearNorth Bear on Jul 21, 2020
// Default Parameters
sayHello(hello: string = 'hello') {
  console.log(hello);
}

sayHello(); // Prints 'hello'

sayHello('world'); // Prints 'world'

Source: medium.com

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3

how to make a parameter optional in typescript

By JenovaJenova on Jan 24, 2021
// Optional parameter
function foo(x?: number) {
    console.log("x : "+ x);
}
foo();
foo(6);

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1

typescript default parameter

By Good GnuGood Gnu on Aug 27, 2020
function sayName({ first, last = 'Smith' }: {first: string; last?: string }): void {
  const name = first + ' ' + last;
  console.log(name);
}

sayName({ first: 'Bob' });

Source: stackoverflow.com

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2

typescript make function argument optional

By Blushing BugBlushing Bug on Jan 05, 2021
        
            
        
     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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0

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