javascript - 获取评估后的答案以在显示屏上阅读

Question

只是想知道是否有人可以建议如何在这段 JS 的末尾获取评估的答案，以便在我创建的显示 ID 上读取？

function setup() {
var i;
for (i = 0; i <= 9; i++) {
document.getElementById(i).onclick = handleInput;
document.getElementById("operator_*").onclick = handleInput;
document.getElementById("operator_/").onclick = handleInput;
document.getElementById("operator_.").onclick = handleInput;
document.getElementById("operator_-").onclick = handleInput;
document.getElementById("operator_+").onclick = handleInput;

var x;  
document.getElementById("operator_=").onclick = evaluateInput;

}

}

function handleInput(e) {
var s = document.getElementById("display").childNodes[0];
s.nodeValue += e.srcElement.childNodes[0].nodeValue ;
console.log(e.srcElement.id);

}

function evaluateInput(e) {
console.log(eval(document.getElementById("display").childNodes[0].nodeValue));

}

非常感谢...

Answer 1

Do you have any advice for the issue at hand?

事实上，我也这么认为:)

DEMO

function setup() {
    var i;
    for (i = 0; i <= 9; i++) {
        document.getElementById(i).onclick = handleInput;
        document.getElementById("operator_*").onclick = handleInput;
        document.getElementById("operator_/").onclick = handleInput;
        document.getElementById("operator_.").onclick = handleInput;
        document.getElementById("operator_-").onclick = handleInput;
        document.getElementById("operator_+").onclick = handleInput;

        //var x;
        document.getElementById("operator_=").onclick = evaluateInput;
    }
}

function handleInput(e) {
    var s = document.getElementById("display");
    s.innerHTML += e.srcElement.childNodes[0].nodeValue;
}

function evaluateInput(e) {
    var s = document.getElementById("display");
    s.innerHTML = eval(document.getElementById("display").childNodes[0].nodeValue);
}

setup();