我已经使用了
<button onclick="addPoint()>
&nbsp;
var p = document.getElementById("p");
var total = 0;
function addPoint() {
total++
}
function minusPoint() {
total--;
}
p.innerHTML = total;
您需要在下面的点击处理程序内更新元素值 p.innerHTML = total;
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>
使用InnerHTML每次单击按钮时更新总计。
var p = document.getElementById("p");
var total = 0;
function addPoint() {
total++;
p.innerHTML = total;
}
function minusPoint() {
total--;
p.innerHTML = total;
}