how to left pad a string? in typescript

To left pad a string in TypeScript, you can use the padStart method that is available on strings. The padStart method takes two arguments: the total length to which the string should be padded, and the padding character(s) to use.

Here's an example:

index.ts
const str = "23";
const paddedStr = str.padStart(5, "0");
console.log(paddedStr); // prints "00023"
100 chars
4 lines

In this example, the str variable is padded with zeros to the left to a total length of 5 characters.

Note: padStart was introduced in ES2017 and may not be available in older versions of TypeScript.