decimal插件计算

import {
Decimal
} from 'decimal.js'; //引入
export const cal = {
jia(num1, num2) {
return new Decimal(num1).add(new Decimal(num2))
},
jian(num1, num2) {
return new Decimal(num1).sub(new Decimal(num2))
},
cheng(num1, num2) {
return new Decimal(num1).mul(new Decimal(num2))
},
chu(num1, num2) {
return new Decimal(num1).div(new Decimal(num2))
},
}

/* 解决js计算精度问题 */
export function cheng(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);
}
export function jia(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;

}

export function chu(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);

}

export function jian(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));
//lastmodifybydeeka
//动态控制精度长度
// n = (r1 >= r2) ? r1 : r2;
return ((arg1 * m - arg2 * m) / m);
}