<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>practice</title>
<style>
body{background:black}
#cvs{background:white}
</style>
<script>
window.onload=function(){
var oCvs=document.getElementById("cvs");
var oGc=oCvs.getContext("2d");
oGc.font="60px impact";
oGc.textBaseline="top";
oGc.fillText("妙味课堂",0,0);
}
</script>
</head>
<body>
<canvas id="cvs" width="400px" height="400px"></canvas>
</body>
</html>
oGc.textBaseline="hanging";
css rester没有写
你是指这个 canvas#cvs
距离顶部有空隙吗?
如果是这个意思,那么是因为 body 有默认的样式:
body {
display: block;
margin: 8px;
}
RESET 掉就可以了