How Can I Achieve printf/String.Format Functionality for Number Formatting in JavaScript?

JavaScript Analogue of printf/String.Format

You seek a JavaScript equivalent to C/PHP printf() or C#/Java String.Format() specifically for number formatting with thousand separators. The Microsoft Ajax library provides String.Format(), but you prefer a lightweight solution.

Current JavaScript

ES6 introduces template strings, offering a concise alternative:

let soMany = 10;
console.log(`This is ${soMany} times easier!`);
// "This is 10 times easier!"

Older Solutions

Consider the sprintf() library for JavaScript. Alternatively, implement your own simplified format method as follows:

function format(template, ...args) {
  return template.replace(/{(\d+)}/g, (match, index) => args[index]);
}

This approach avoids successive replacements that can lead to errors when replacement strings contain format sequences.

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