<head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="chrome=1"> <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width"> <style> * { padding: 0; margin: 0; box-sizing: border-box; } </style>
</head>
<body> <img id="img" width="50px" height="50px" src="">
<script> function createImg(distance, color,text) { var c = document.createElement("canvas"); c.width = distance; //注意：没有单位 c.height = distance; //注意：没有单位 var ctx = c.getContext("2d"); ctx.beginPath(); ctx.fillStyle ="green"; ctx.fillRect(0, 0, distance, distance); ctx.moveTo (0,0); ctx.lineTo (0,distance); ctx.lineTo (distance,distance); ctx.lineTo (distance,0); ctx.lineTo (0,0); ctx.lineWidth = 1; ctx.strokeStyle = color; ctx.stroke(); ctx.textAlign = 'center'; ctx.font = "bold "+distance/10+"px Arial"; ctx.fillStyle = 'yellow'; ctx.fillText(text, distance / 2, distance / 2+3); return c.toDataURL("image/png"); } document.getElementById('img').src= createImg(50, "red","833336") </script> </body>
</html>