String Padding – ECMAScript 2017 (ES8)

ES8 introduced the padStart() and padEnd() methods that allow string padding.

The padStart() method pads a string with another string until it reaches a specified length. Its syntax is:

str.padStart(targetLength [, padString])

• targetLength: The length of the resulting string.
• padString (optional): The string to pad the original string with. If not specified, the string will be padded with spaces.

Example:

let str = 'hello';
let paddedStr = str.padStart(10, '-');
console.log(paddedStr); // '-----hello'

The padEnd() method works similarly but pads the end of the string instead of the beginning:

str.padEnd(targetLength [, padString])

Example:

let str = 'world';
let paddedStr = str.padEnd(10, '-');
console.log(paddedStr); // 'world-----'

Both methods are useful for formatting strings and aligning them within a fixed-width display.