javascript - 无法在 html 中显示 javascript 变量

Question

这是代码:

<div id="screen1">You do not have javascript enabled.</div>
<div id="screen2">You do not have javascript enabled.</div>
<script>
   document.getElementById("screen1").innerHTML = return window.screen.availHeight;
   document.getElementById("screen2").innerHTML = return window.screen.availWidth;
</script>

screen1 和 screen2 的输出都是 You do not have javascriptenabled.，我认为这种方式可行，因为我使用了这个之前并且有效:

<div id="locale">You do not have javascript enabled.</div>
<script>document.getElementById("locale").innerHTML = getLang();</script>   

Answer 1

如果删除 return 关键字，一切都会正常进行。由于您没有在函数内部定义，因此 return 关键字不合适。

document.getElementById("screen1").innerHTML = window.screen.availHeight;
document.getElementById("screen2").innerHTML = window.screen.availWidth;

<div id="screen1">You do not have javascript enabled.</div>
<div id="screen2">You do not have javascript enabled.</div>