如何将字符串类型的两位小数相乘 javascript

Question

我想把这两个字符串类型的值相乘

值 1 = "$10.99"

值 2 = "$20.8"

var x = document.getElementById("Text1");
var y = document.getElementById("Text2");
var tointx = x.Value
var tointy = y.Value
var z = tointx * tointy
var result = z.reduc((r, e) => r + +e.replace(',', '.'), 0)
alert(result);

<input id="Text1" value="$10.99" />

<input id="Text2" value="$20.8" />

Answer 1

几件事

1. .valueJS 区分大小写
2. $ 符号需要去
3. reduce 也拼错但不需要
4. 确定要整数吗？

const x = document.getElementById("Text1").value;
const y = document.getElementById("Text2").value;
let tofloatx = +x.slice(1); // unary plus will convert to number but so will multiplication
let tofloaty = +y.slice(1)
let z = tofloatx * tofloaty
console.log("float",z,"int",Math.round(z))

<input id="Text1" value="$10.99" />

<input id="Text2" value="$20.8" />

Answer 2

multiplyFields();

function multiplyFields( ) {
 var x = Text1.value,
     y = Text2.value,
     z = x.match( /[0-9.]+/ ) * y.match( /[0-9.]+/ );

    alert( z );
}

<input id=Text1 value=$10.99 >
<input id=Text2 value=$20.80 >

Answer 3

这是你需要的吗？

let x = "$10.99"
let y = "$20.8"
let moneyToNb = function(money) {return Number(money.replace("$",""))}
let intX = moneyToNb(x)
let intY = moneyToNb(y)
let z = Math.floor(intX*intY)
console.log(z);