<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<title>Avatar</title>
<style>
* {
font-family: microsoft yahei;
font-family: "Exo 2", "iconfont", "Trebuchet MS", "Helvetica", "Arial", 'PingFang SC', 'Hiragino Sans GB', 'STHeiti Light', 'Microsoft YaHei', 'SimHei', 'WenQuanYi Micro Hei', sans-serif;
letter-spacing: 0.04em;
}
.container {
max-width: 1000px;
}
h3 {
margin-top: 35px;
margin-bottom: 20px;
}
.round { border-radius: 50%; }
</style>
</head>
<body>
<h3>使用方法</h3>
<pre>
<code><img width="256" height="256" avatar="Ban Xian" color="#0D8ABC"></code>
</pre>
<h3>在线演示</h3>
<img width="256" height="256" avatar="Ban Xian" color="#0D8ABC">
<div>
<img width="100" height="100" avatar="默">
<img width="100" height="100" avatar="认">
<img width="100" height="100" avatar="头" color="#2c3e50">
<img width="100" height="100" avatar="像" color="#c0392b">
</div>
<br>
<div>
<img class="round" width="100" height="100" avatar="圆">
<img class="round" width="100" height="100" avatar="角">
<img class="round" width="100" height="100" avatar="示" color="#e67e22">
<img class="round" width="100" height="100" avatar="例" color="#1abc9c">
</div>
<h3>插件完整代码</h3>
<pre>
/**
* LetterAvatar
*
* Artur Heinze
* Create Letter avatar based on Initials
* based on https://github.com/daolavi/LetterAvatar
*/
(function(w, d){
function LetterAvatar (name, size, color) {
name = name || '';
size = size || 60;
var colours = [
"#1abc9c", "#2ecc71", "#3498db", "#9b59b6", "#34495e", "#16a085", "#27ae60", "#2980b9", "#8e44ad", "#2c3e50",
"#f1c40f", "#e67e22", "#e74c3c", "#00bcd4", "#95a5a6", "#f39c12", "#d35400", "#c0392b", "#bdc3c7", "#7f8c8d"
],
nameSplit = String(name).split(' '),
initials, charIndex, colourIndex, canvas, context, dataURI;
if (nameSplit.length == 1) {
initials = nameSplit[0] ? nameSplit[0].charAt(0):'?';
} else {
initials = nameSplit[0].charAt(0) + nameSplit[1].charAt(0);
}
if (w.devicePixelRatio) {
size = (size * w.devicePixelRatio);
}
charIndex = (initials == '?' ? 72 : initials.charCodeAt(0)) - 64;
colourIndex = charIndex % 20;
canvas = d.createElement('canvas');
canvas.width = size;
canvas.height = size;
context = canvas.getContext("2d");
context.fillStyle = color ? color : colours[colourIndex - 1];
context.fillRect (0, 0, canvas.width, canvas.height);
context.font = Math.round(canvas.width/2)+"px 'Microsoft Yahei'";
context.textAlign = "center";
context.fillStyle = "#FFF";
context.fillText(initials, size / 2, size / 1.5);
dataURI = canvas.toDataURL();
canvas = null;
return dataURI;
};
LetterAvatar.transform = function() {
Array.prototype.forEach.call(d.querySelectorAll('img[avatar]'), function(img, name, color) {
name = img.getAttribute('avatar');
color = img.getAttribute('color');
img.src = LetterAvatar(name, img.getAttribute('width'), color);
img.removeAttribute('avatar');
img.setAttribute('alt', name);
});
};
// AMD support
if (typeof define === 'function' && define.amd) {
define(function () { return LetterAvatar; });
// CommonJS and Node.js module support.
} else if (typeof exports !== 'undefined') {
// Support Node.js specific `module.exports` (which can be a function)
if (typeof module != 'undefined' && module.exports) {
exports = module.exports = LetterAvatar;
}
// But always support CommonJS module 1.1.1 spec (`exports` cannot be a function)
exports.LetterAvatar = LetterAvatar;
} else {
window.LetterAvatar = LetterAvatar;
d.addEventListener('DOMContentLoaded', function(event) {
LetterAvatar.transform();
});
}
})(window, document);
</pre>
<h3>修改为仅绘制一个字符作为头像 过滤 emoji</h3>
<pre>
(function (w, d) {
window.LetterAvatar = function (name, size, color) {
name = name || '';
size = size || 60;
var colours = [
"#1abc9c", "#2ecc71", "#3498db", "#9b59b6", "#34495e", "#16a085", "#27ae60", "#2980b9", "#8e44ad", "#2c3e50",
"#f1c40f", "#e67e22", "#e74c3c", "#ecf0f1", "#95a5a6", "#f39c12", "#d35400", "#c0392b", "#bdc3c7", "#7f8c8d"
],
initials, charIndex, colourIndex, canvas, context, dataURI;
initials = String(name);
initials = initials.replace(/uD83C[uDF00-uDFFF]|uD83D[uDC00-uDE4F]/g, ""); // 去除 emoji
initials = initials? initials.charAt(0): '?';
if (w.devicePixelRatio) {
size = (size * w.devicePixelRatio);
}
charIndex = (initials == '?' ? 72 : initials.charCodeAt(0)) - 64;
colourIndex = charIndex % colours.length;
canvas = d.createElement('canvas');
canvas.width = size;
canvas.height = size;
context = canvas.getContext("2d");
context.fillStyle = color ? color : colours[colourIndex - 1];
context.fillRect(0, 0, canvas.width, canvas.height);
context.font = Math.round(canvas.width / 2) + "px 'Microsoft Yahei'";
context.textAlign = "center";
context.fillStyle = "#fff";
context.fillText(initials, size / 2, size / 1.5);
dataURI = canvas.toDataURL();
canvas = null;
return dataURI;
};
})(window, document);
</pre>
<script>
/**
* LetterAvatar
*
* Artur Heinze
* Create Letter avatar based on Initials
* based on https://github.com/daolavi/LetterAvatar
*/
(function(w, d){
function LetterAvatar (name, size, color) {
name = name || '';
size = size || 60;
var colours = [
"#1abc9c", "#2ecc71", "#3498db", "#9b59b6", "#34495e", "#16a085", "#27ae60", "#2980b9", "#8e44ad", "#2c3e50",
"#f1c40f", "#e67e22", "#e74c3c", "#00bcd4", "#95a5a6", "#f39c12", "#d35400", "#c0392b", "#bdc3c7", "#7f8c8d"
],
nameSplit = String(name).split(' '),
initials, charIndex, colourIndex, canvas, context, dataURI;
if (nameSplit.length == 1) {
initials = nameSplit[0] ? nameSplit[0].charAt(0):'?';
} else {
initials = nameSplit[0].charAt(0) + nameSplit[1].charAt(0);
}
if (w.devicePixelRatio) {
size = (size * w.devicePixelRatio);
}
charIndex = (initials == '?' ? 72 : initials.charCodeAt(0)) - 64;
colourIndex = charIndex % 20;
canvas = d.createElement('canvas');
canvas.width = size;
canvas.height = size;
context = canvas.getContext("2d");
context.fillStyle = color ? color : colours[colourIndex - 1];
context.fillRect (0, 0, canvas.width, canvas.height);
context.font = Math.round(canvas.width/2)+"px 'Microsoft Yahei'";
context.textAlign = "center";
context.fillStyle = "#FFF";
context.fillText(initials, size / 2, size / 1.5);
dataURI = canvas.toDataURL();
canvas = null;
return dataURI;
};
LetterAvatar.transform = function() {
Array.prototype.forEach.call(d.querySelectorAll('img[avatar]'), function(img, name, color) {
name = img.getAttribute('avatar');
color = img.getAttribute('color');
img.src = LetterAvatar(name, img.getAttribute('width'), color);
img.removeAttribute('avatar');
img.setAttribute('alt', name);
});
};
// AMD support
if (typeof define === 'function' && define.amd) {
define(function () { return LetterAvatar; });
// CommonJS and Node.js module support.
} else if (typeof exports !== 'undefined') {
// Support Node.js specific `module.exports` (which can be a function)
if (typeof module != 'undefined' && module.exports) {
exports = module.exports = LetterAvatar;
}
// But always support CommonJS module 1.1.1 spec (`exports` cannot be a function)
exports.LetterAvatar = LetterAvatar;
} else {
window.LetterAvatar = LetterAvatar;
d.addEventListener('DOMContentLoaded', function(event) {
LetterAvatar.transform();
});
}
})(window, document);
</script>
</body>
</html>