Javascript 尝试添加一个按钮,该按钮每次按下时都会更改我的导航栏的背景色
你好,我从Javascript/CSS开始。我目前正在练习Javascript 尝试添加一个按钮,该按钮每次按下时都会更改我的导航栏的背景色,javascript,css,Javascript,Css,你好,我从Javascript/CSS开始。我目前正在练习 ul { list-style-type: none; margin: 0; padding: 0; overflow: hidden; background-color: blueviolet; } li { float: left; } li a { display: inline-block; color: white; /*changes text of the
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
我正在尝试在我的页面上添加一个按钮,每当单击该按钮时,它都会更改导航栏的颜色。有没有办法获得随机生成的颜色?还是我必须在代码中列出颜色
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
这是我当前的测试页面。
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
ul{
列表样式类型:无;
保证金:0;
填充:0;
溢出:隐藏;
背景色:蓝紫色;
}
李{
浮动:左;
}
李阿{
显示:内联块;
颜色:白色;/*更改导航栏的文本*/
文本对齐:居中;
填充:14px 16px;
文字装饰:无;
}
李娜:停下来{
背景色:#111;
}
函数myFunction(){
document.body.style.backgroundColor=“红色”;
}
谢谢。在我的版本中,它会获得3个随机数(从0到255)来设置RGB值
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
函数changecolor(){
var x=数学地板((数学随机()*255)+0);
变量y=Math.floor((Math.random()*255)+0);
var z=数学地板((数学随机()*255)+0);
document.getElementsByTagName(“ul”)[0].style.backgroundColor=“rgb”(“+x+”、“+y+”、“+z+”);
}
ul{
背景:薰衣草;
}
单击
试试这个
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
function getRandomColor() {
var letters = '0123456789ABCDEF'.split('');
var color = '#';
for (var i = 0; i < 6; i++ ) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
$('#button_name').on('click', function(){
var color = getRandomColor();
document.body.style.backgroundColor = color;
});
函数getRandomColor(){
变量字母='0123456789ABCDEF'。拆分('');
var color='#';
对于(变量i=0;i<6;i++){
颜色+=字母[Math.floor(Math.random()*16)];
}
返回颜色;
}
$('#按钮名称')。在('单击',函数()上){
var color=getRandomColor();
document.body.style.backgroundColor=颜色;
});
检查您是否可以执行以下操作:
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
HTML:
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
这是我用随机抽样法对它的看法。使用HSL可以拥有随机颜色,但仍然可以分别控制颜色的色调强度和亮度
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>
// make button do something on click
var btn = document.getElementById( 'navcol-btn' );
btn.addEventListener( 'click', function()
{
// target navbar ul by ID
var nav = document.getElementById( 'navbar' ),
rand = Math.random() * 360;
// change bg-color
nav.style['background-color'] = 'hsl('+rand+', 50%, 50%)';
});
用于生成随机颜色十六进制值的辅助函数谢谢!我不太确定如何将其整合到我的导航栏中。例如,document.body.style.backgroundColor=“red”;更改页面的背景。导航栏有一个吗?@Rorix如果你看一下我的解决方案,每次单击导航栏时它都会将颜色更改为随机值。如果你愿意,你可以为
ul
(例如
)设置Id
),然后使用document.getElementById(“navbar”)
而不是document.getElementsByTagName(“ul”)[0]
这是一个很好的替代正常rgb和十六进制值的解决方案。
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: blueviolet;
}
li {
float: left;
}
li a {
display: inline-block;
color: white; /*changes text of the nav bar */
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover {
background-color: #111;
}
</style>
</head>
<body>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="#news">News</a></li>
<li><a href="#contact">Contact</a></li>
<li><a href="#about">About</a></li>
</ul>
<script>
function myFunction() {
document.body.style.backgroundColor = "red";
}
</script>
</body>
</html>