1
<p id="demo">单击按钮显示正无穷大的数值</p>2
<button onclick="myFunction()">点我</button>3
<script>4
function myFunction() {5
var demo = document.getElementById("demo");6
demo.innerHTML = Number.POSITIVE_INFINITY;7
}8
</script>
<p id="demo">单击按钮显示正无穷大的数值</p><button onclick="myFunction()">点我</button><script> function myFunction() { var demo = document.getElementById("demo"); demo.innerHTML = Number.POSITIVE_INFINITY; }</script>