Question

How to check if a string is empty or spaces in TypeScript

Answer 1

function isEmptyOrSpaces(str: any){
    return str === null || str.match(/^ *$/) !== null;
}

const s1: string = 'typescript';
console.log(isEmptyOrSpaces(s1));

const s2: string = '';
console.log(isEmptyOrSpaces(s2));

const s3: string = '     ';
console.log(isEmptyOrSpaces(s3));

const s4 = null;
console.log(isEmptyOrSpaces(s4));



/*
run:

false
true
true
true

*/

 

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