JavaScript 数字格式化 三位逗号分隔

// 数字格式化，三位逗号分隔export const formatNum = (nums: number) => {let num = (nums || 0).toString();const re = /\d{3}$/;let result = '';while (re.test(num)) {result = RegExp.lastMatch + result;if (num !== RegExp.lastMatch) {result = `,${result}`;num = (RegExp as any).leftContext;} else {num = '';break;}}if (num) {result = num + result;}return result;};