Javascript 带有onclick事件的多个画布作为按钮
我在画布代码方面遇到了很大的问题,我在logo页面中只使用了1次,效果很好,我尝试将其用作菜单按钮,问题是,我不知道我到底做错了什么,希望你们中的一些人能帮助我 这是我用于徽标的代码,工作正常: HTML代码:Javascript 带有onclick事件的多个画布作为按钮,javascript,html,css,canvas,graphics2d,Javascript,Html,Css,Canvas,Graphics2d,我在画布代码方面遇到了很大的问题,我在logo页面中只使用了1次,效果很好,我尝试将其用作菜单按钮,问题是,我不知道我到底做错了什么,希望你们中的一些人能帮助我 这是我用于徽标的代码,工作正常: HTML代码: <html> <head> <title>canvas</title> </head> <body> <div id="container">
<html>
<head>
<title>canvas</title>
</head>
<body>
<div id="container">
<div id="logo">
<canvas style="" width="800" id="broken-glass"></canvas>
<h1 style="color: rgba(250, 250, 250, 0.95);" id="logo-title">Canvas</h1>
</div>
<script type="text/javascript">
(function() {
var isCanvasSupported = function () {
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
};
if( isCanvasSupported() ) {
var canvas = document.getElementById('broken-glass'),
context = canvas.getContext('2d'),
width = canvas.width = Math.min(800, window.innerWidth),
height = canvas.height,
numTriangles = 100,
rand = function(min, max){
return Math.floor( (Math.random() * (max - min + 1) ) + min);
};
window.drawTriangles = function(){
context.clearRect(0, 0, width, height);
var hue = rand(0,360);
var increment = 80 / numTriangles;
for(var i = 0; i < numTriangles; i++) {
context.beginPath();
context.moveTo(rand(0,width), rand(0,height) );
context.lineTo(rand(0,width), rand(0,height) );
context.lineTo(rand(0,width), rand(0,height) );
context.globalAlpha = 0.5;
context.fillStyle = 'hsl('+Math.round(hue)+', '+rand(15,60)+'%, '+ rand(10, 60) +'%)';
context.closePath();
context.fill();
hue+=increment;
if(hue > 360) hue = 0;
}
canvas.style.cssText = '-webkit-filter: contrast(115%);';
};
document.getElementById('logo-title').style.color = 'rgba(250, 250, 250, 0.95)';
drawTriangles();
var el = document.getElementById('logo');
el.onclick = function() {
drawTriangles();
};
}
})();
</script>
</div>
</body>
</html>
当我将id更改为类时,最大的问题就出现了。在html中,id标记与class标记重叠。。。h1标记的文本不在画布上。。。问题就这么多,有人能告诉我我做错了什么吗?如何修复它,我在几个小时内尝试
提前谢谢你太多了 你可以试着放一把!在css中的每个代码中都很重要。 例如: 这解决了我以前的问题,希望它也能解决你的问题
#broken-glass
{
position: absolute;
left: 0px;
top: 0px;
width: 100%;
}
#logo h1
{
text-align: center;
font-weight: 700;
width: 100%;
color: #000;
position: absolute;
left: 0px;
-moz-user-select: none;
cursor: pointer;
margin-top: 27px;
font-size: 63px;
line-height: 1.4;
top: 0px;
margin-bottom: 5px;
text-rendering: optimizelegibility;
font-family: Calibri,"PT Sans","Trebuchet MS","Helvetica Neue",Arial;
}
text-align: center !important;
font-weight: 700 !important;