1 /* eslint-disable-next-line */
2 Number.prototype.toFixed = function(d) {
3 let s = `${this}`
4 /* eslint-disable-next-line */
5 if (!d) d = 0
6 if (s.indexOf(".") === -1) s += "."
7 s += new Array(d + 1).join("0")
8 if (new RegExp(`^(-|\\+)?(\\d+(\\.\\d{0,${d + 1}})?)\\d*$`).test(s)) {
9 s = `0${RegExp.$2}`
10 const pm = RegExp.$1
11 let a = RegExp.$3.length
12 let b = true
13 if (a === d + 2) {
14 a = s.match(/\d/g)
15 if (parseInt(a[a.length - 1], 10) > 4) {
16 for (let i = a.length - 2; i >= 0; i--) {
17 a[i] = parseInt(a[i], 10) + 1
18 if (a[i] === 10) {
19 a[i] = 0
20 b = i !== 1
21 } else break
22 }
23 }
24 s = a.join("").replace(new RegExp(`(\\d+)(\\d{${d}})\\d$`), "$1.$2")
25 }
26 if (b) s = s.substr(1)
27 return (pm + s).replace(/\.$/, "")
28 }
29 return `${this}`
30 }
