fill string with 0 javascript code example

Example 1: lpad javascript

str.padStart(targetLength [, padString])

Example 2: string padStart padEnd

let string = ‘Alice’; 
// padStart() — we assume our string needs to have 10 characters 
string.padStart(10, ‘o’); // returns ‘oooooAlice’
// padEnd() 
string.padEnd(10, ‘o’); // returns ‘Aliceooooo’;