前端實現獲取兩位小數(toFixed(num))
阿新 • • 發佈:2020-12-11
技術標籤:javajsjavascript
toFixed(num)方法可把 Number 四捨五入為指定小數位數的數字。
num :規定小數的位數,是 0 ~ 20 之間的值,包括 0 和 20,有些實現可以支援更大的數值範圍。如果省略了該引數,將用 0 代替。
bigDecimal.js:
const bigDecimal = function() { //加 function add(arg1,arg2){ var r1,r2,m; try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} m=Math.pow(10,Math.max(r1,r2)); return (arg1*m+arg2*m)/m; } //減 function sub(arg1,arg2){ var r1,r2,m,n; try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} m=Math.pow(10,Math.max(r1,r2)); //動態控制精度長度 n=(r1>=r2)?r1:r2; return ((arg1*m-arg2*m)/m).toFixed(n); } //乘 function mul(arg1,arg2) { var m=0,s1=arg1.toString(),s2=arg2.toString(); try{m+=s1.split(".")[1].length}catch(e){} try{m+=s2.split(".")[1].length}catch(e){} return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m); } //除 function div(arg1,arg2){ var t1=0,t2=0,r1,r2; try{t1=arg1.toString().split(".")[1].length}catch(e){} try{t2=arg2.toString().split(".")[1].length}catch(e){} r1=Number(arg1.toString().replace(".","")); r2=Number(arg2.toString().replace(".","")); return (r1/r2)*Math.pow(10,t2-t1); } // exports return { add: add, sub: sub, mul: mul, div: div } }(); export default bigDecimal;
不保留兩位小數:
getEntScalePre() {
// debugger
if ((this.viewForm.agencyQuickTotal == 0 || this.viewForm.agencyQuickTotal == null || this.viewForm.agencyQuickTotal == "")
|| (this.viewForm.rdTotal == 0 || this.viewForm.rdTotal == null || this.viewForm. rdTotal == "")
|| (this.viewForm.slTotal == 0 || this.viewForm.slTotal == null || this.viewForm.slTotal == "")
|| (this.viewForm.sjTotal == 0 || this.viewForm.sjTotal == null || this.viewForm.sjTotal == "")) {
this .$error("四家中有可能沒有給出估出價值,請轉人工");
return;
} else {
this.viewForm.systemTotal = bigDecimal.add(bigDecimal.mul(this.viewForm.agencyQuickTotal, 0.1024), bigDecimal.mul(this.viewForm.rdTotal, 0.1867));
this.viewForm.systemTotal = bigDecimal.add(this.viewForm.systemTotal, bigDecimal.mul(this.viewForm.slTotal, 0.3952));
this.viewForm.systemTotal = bigDecimal.add(this.viewForm.systemTotal, bigDecimal.mul(this.viewForm.sjTotal, 0.2531));
this.viewForm.systemTotal = (bigDecimal.add(this.viewForm.systemTotal, 17.89));
this.rgVisible = false;
this.$nextTick(() => {
this.rgVisible = true;
})
}
保留兩位小數:
getEntScalePre() {
// debugger
if ((this.viewForm.agencyQuickTotal == 0 || this.viewForm.agencyQuickTotal == null || this.viewForm.agencyQuickTotal == "")
|| (this.viewForm.rdTotal == 0 || this.viewForm.rdTotal == null || this.viewForm.rdTotal == "")
|| (this.viewForm.slTotal == 0 || this.viewForm.slTotal == null || this.viewForm.slTotal == "")
|| (this.viewForm.sjTotal == 0 || this.viewForm.sjTotal == null || this.viewForm.sjTotal == "")) {
this.$error("四家中有可能沒有給出估出價值,請轉人工");
return;
} else {
this.viewForm.systemTotal = bigDecimal.add(bigDecimal.mul(this.viewForm.agencyQuickTotal, 0.1024), bigDecimal.mul(this.viewForm.rdTotal, 0.1867));
this.viewForm.systemTotal = bigDecimal.add(this.viewForm.systemTotal, bigDecimal.mul(this.viewForm.slTotal, 0.3952));
this.viewForm.systemTotal = bigDecimal.add(this.viewForm.systemTotal, bigDecimal.mul(this.viewForm.sjTotal, 0.2531));
this.viewForm.systemTotal = (bigDecimal.add(this.viewForm.systemTotal, 17.89)).toFixed(2);
this.rgVisible = false;
this.$nextTick(() => {
this.rgVisible = true;
})
}