摘要：JS 丢失精度的问题在网上一搜一大片，所以我就找了一个使用Number.prototype.mul = function (a) { var b = 0, c = this.toString(), d = a.toString(); try { b += c.split(".")[1].length } catch (e) {} try { b += d.split(".")[1].length } catch (e) {} return Number(c.replace(".", "")) * Number(d. 阅读全文