javascript - 如何修复此代码？单击按钮将获得 1 分，另一个按钮将获得 1 分

Question

我用过

<button onclick="addPoint()> 

 

var p = document.getElementById("p");
var total = 0;


function addPoint() {
    total++
}

function minusPoint() {
    total--;
}

p.innerHTML = total;

Answer 1

您需要更新点击处理程序内的元素值p.innerHTML = Total;，如下所示

var p = document.getElementById("p"); var total = 0;
function addPoint() {
    total++;
    p.innerHTML = total;
}

function minusPoint() {
    total--;
    p.innerHTML = total;
}

<button class="button" onclick="addPoint()">add a point</button> <button class="button" onclick="minusPoint()">remove a point</button> <p id="p">Points:</p>