javascript - 如何将字符串javascript类型的两位小数相乘

Question

我想将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. .value JS区分大小写
2. $ 符号需要去掉
3. reduce 也拼错了，但不需要
4. 你确定要整数吗？

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" />