javascript - 如何将按钮高度设置为视口(viewport)高度

Question

我这样做是为了获取视口(viewport)高度并为其设置按钮高度

var viewportHeight = $(window).height();
var viewPortHeightStr = `\"${viewportHeight}px\"`
document.getElementById("button").style.height = viewPortHeightStr
console.log('viewPortHeightStr = '+viewPortHeightStr) // prints "750px"

控制台记录 "750px" 但按钮的高度不受影响，但是这有效

document.getElementById("button").style.height = "750px"

为什么？

这是按钮标签

<button id="button" class="btn-basic">x</button>

Answer 1

在 CSS 中很容易。使用:

height: 100vh;

这意味着视口(viewport)高度的 100%。

在您的代码中，问题似乎是:

var viewPortHeightStr = `\"${viewportHeight}px\"`
// change it to:
var viewPortHeightStr = viewportHeight + 'px';

片段:

var viewportHeight = $(window).height();
var viewPortHeightStr = viewportHeight + 'px';
document.getElementById("button").style.height = viewPortHeightStr
console.log('viewPortHeightStr = '+viewPortHeightStr) // prints "750px"

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="button" class="btn-basic">x</button>