ascor/lib/esm/utils/toThousands.js

一些常用的简单的js工具

/**
 * 格式化数值，每三位加逗号
 * @param  num 传入需要格式化的数值
 * @return string 返回格式化后的数值
 */
export const toThousands = (num) => {
    if (isNaN(num)) {
        return num;
    }
    num = (num || 0).toString();
    let number = 0, floatNum = "", intNum = "";
    // 判断是否有小数位，有则截取小数点后的数字
    if (num.indexOf(".") > 0) {
        number = num.indexOf("."); // 获取小数点出现的位置
        floatNum = num.substr(number); // 截取arr.substr(form, length)
        intNum = num.substring(0, number); // 截取arr.substring(start, end)
    }
    else {
        intNum = num;
    }
    let result = [], counter = 0;
    intNum = intNum.split("");
    // 利用3的倍数，向数组插入','
    for (let i = intNum.length - 1; i >= 0; i--) {
        counter++;
        result.unshift(intNum[i]);
        if (!(counter % 3) && i != 0) {
            result.unshift(",");
        }
    }
    return result.join("") + floatNum || "";
};