我正在尝试编写一个需要使用按钮更改背景的网站,但我无法...
我创建了一个按钮,可以在单击按钮时更改背景颜色,但是在添加图像作为背景后,它不想更改背景颜色(显然)...
<head>
<style>
:root{
--main-bg: url(https://www.the url of my bg.jpg);
}
</style> // creating a variable for the bg of my site
<style>
body {
background: var(--main-bg) repeat-x;
}
</style> // using this variable
<script>
var colors = ["#2d2d2d", "#f2f2f2"];
var colorIndex = 0;
function changeColor() {
var col = document.getElementById("body");
if( colorIndex >= colors.length ) {
colorIndex = 0;
}
col.style.backgroundColor = colors[colorIndex];
colorIndex++;
// the js script to change the bg color
}
</script>
<script>
function backgroundHiding() {
let root = document.documentElement;
root.addEventListener("onclick", e => {
if (--main-bg) = "#2d2d2d" {
root.style.setProperty('--main-bg', " url(https://www.the urlof my bg.jpg)")
} else {
root.style.setProperty('--main-bg', "#2d2d2d")
}
// the js script to hide my img bg
}
</script>
<div class="button">
<body id='body'>
<button onclick="changeColor(); backgroundHiding();" class="lightbutton"><span>Turn On/Off the lights</span> </button>
</div> // creating the button that interact with the two js functions
</head>
我预计它会起作用,但是......呃......不它有时有效,比如每 100 次 1 次,我不知道为什么......如果有人能帮助我,我会很感激!
https://stackblitz.com/edit/typescript-ppvsvl?embed=1&file=index.html
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