@cainiaofe/cn-utils/lib/utils/decimal/index.js

菜鸟前端基础工具库

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.numFormat = exports.numFixed = void 0;
var type_1 = require("../../common/type");
/**
 * 保留浮点数位数函数
 *
 * @param {Number} num
 * @param {Number} bit
 */
var numFixed = function (num, bit, round) {
    if (bit === void 0) { bit = 2; }
    if (round === void 0) { round = true; }
    if (!(0, type_1.isNumber)(num)) {
        throw new Error('需传递数字类型');
    }
    // num.toFixed(bit) * 1; //12.145.toFixed(2) 12.14  12.175.toFixed(2)  12.18 银行家舍入规则
    if (round) {
        // 默认四舍五入
        return Math.round(num * Math.pow(10, bit)) / Math.pow(10, bit);
    }
    else {
        // 不四舍五入
        num += '';
        var index = num.indexOf('.');
        if (index === -1) {
            return +num;
        }
        else {
            var lastIndex = Math.min(index + bit + 1, num.length);
            return +num.slice(0, lastIndex);
        }
    }
};
exports.numFixed = numFixed;
/**
 * 格式化数字
 *
 * @param {Number} num
 * @param {Number} bit
 */
var numFormat = function (num, format) {
    if ((0, type_1.isNaN)(num * 1)) {
        // 不是数字直接返回
        return num;
    }
    if ((0, type_1.isNumber)(format)) {
        // 传递数字，默认保留小数位
        return (0, exports.numFixed)(num, format || 2); // 默认保留两位
    }
    if (format === '%') {
        // 传递百分号
        return "".concat((0, exports.numFixed)(num * 100, 2), "%");
    }
    if (format === ',') {
        // 传递，默认三数字分隔
        return (num &&
            (num.toString().indexOf('.') !== -1
                ? num.toString().replace(/(\d)(?=(\d{3})+\.)/g, function ($0, $1) {
                    return "".concat($1, ",");
                })
                : num.toString().replace(/(\d)(?=(\d{3})+\b)/g, function ($0, $1) {
                    return "".concat($1, ",");
                })));
    }
};
exports.numFormat = numFormat;