JS 工具函数集 #tags:jsutils

utils.js

// 千位数
function commafy(num) {
    
    num = num + '';

    var reg = /(-?\d+)(\d{3})/;

    while(reg.test(num)) {
        num = num.replace(reg, '$1,$2');
    }

    return num;
}

// isNumber
const isNumber = x => Number(x) === x;