一般我们处理小数点都是toFixed,这个四舍五入的。如果不想死五入可以先转转化为字符串然后截取在用toFixed formatDecimal(num, decimal) { if(num){ num = num.toString() let index = num.indexOf(‘.’) if (index !== -1) { num = num.substring(0, decimal + index + 1) } else { num = num.substring(0) } } return parseFloat(num).toFixed(decimal) } let newDiscountPrice = this.formatDecimal(discountPrice, 2) newDiscountPrice = parseFloat(newDiscountPrice)*100/10 //有小数点的的时候最好转成整数在处理否则会呕溢出情况 //newDiscountPrice = parseFloat(newDiscountPrice)*10 //像是这种小数点直接乘以10就会出现溢出情况 // let newDiscountPrice = 5 newDiscountPrice = newDiscountPrice%1==0 ? newDiscountPrice+=’.0′ : newDiscountPrice;//一般整数5后面要加5.0,任何整数都能被自身整除也就是余数是0
转载于:https://www.cnblogs.com/pikachuworld/p/11400057.html