我想生成和下载网页截图,而不失去风格。我有一个网页。在那个网页上我有一个下载按钮。当用户点击下载按钮时,整个页面的截图需要在用户电脑中作为图片下载。我该怎么做?
请检查我的密码
Index.html索引
<html>
<body>
<link href="style.css" rel="stylesheet">
<h1>Scrrenshot</h1>
<form class="cf">
<div class="half left cf">
<input type="text" id="input-name" placeholder="Name">
<input type="email" id="input-email" placeholder="Email address">
<input type="text" id="input-subject" placeholder="Subject">
</div>
<div class="half right cf">
<textarea name="message" type="text" id="input-message" placeholder="Message"></textarea>
</div>
<input type="submit" value="Submit" id="input-submit">
</form>
<a class="btn btn-success" href="javascript:void(0);" onclick="generate();">Generate Screenshot »</a>
</body>
<script>
(function (exports) {
function urlsToAbsolute(nodeList) {
if (!nodeList.length) {
return [];
}
var attrName = 'href';
if (nodeList[0].__proto__ === HTMLImageElement.prototype
|| nodeList[0].__proto__ === HTMLScriptElement.prototype) {
attrName = 'src';
}
nodeList = [].map.call(nodeList, function (el, i) {
var attr = el.getAttribute(attrName);
if (!attr) {
return;
}
var absURL = /^(https?|data):/i.test(attr);
if (absURL) {
return el;
} else {
return el;
}
});
return nodeList;
}
function screenshotPage() {
urlsToAbsolute(document.images);
urlsToAbsolute(document.querySelectorAll("link[rel='stylesheet']"));
var screenshot = document.documentElement.cloneNode(true);
var b = document.createElement('base');
b.href = document.location.protocol + '//' + location.host;
var head = screenshot.querySelector('head');
head.insertBefore(b, head.firstChild);
screenshot.style.pointerEvents = 'none';
screenshot.style.overflow = 'hidden';
screenshot.style.webkitUserSelect = 'none';
screenshot.style.mozUserSelect = 'none';
screenshot.style.msUserSelect = 'none';
screenshot.style.oUserSelect = 'none';
screenshot.style.userSelect = 'none';
screenshot.dataset.scrollX = window.scrollX;
screenshot.dataset.scrollY = window.scrollY;
var script = document.createElement('script');
script.textContent = '(' + addOnPageLoad_.toString() + ')();';
screenshot.querySelector('body').appendChild(script);
var blob = new Blob([screenshot.outerHTML], {
type: 'text/html'
});
return blob;
}
function addOnPageLoad_() {
window.addEventListener('DOMContentLoaded', function (e) {
var scrollX = document.documentElement.dataset.scrollX || 0;
var scrollY = document.documentElement.dataset.scrollY || 0;
window.scrollTo(scrollX, scrollY);
});
}
function generate() {
window.URL = window.URL || window.webkitURL;
window.open(window.URL.createObjectURL(screenshotPage()));
}
exports.screenshotPage = screenshotPage;
exports.generate = generate;
})(window);
</script>
</html>
样式表
@import "compass/css3";
@import url(https://fonts.googleapis.com/css?family=Merriweather);
$red: #e74c3c;
*,
*:before,
*:after {
@include box-sizing(border-box);
}
html, body {
background: #f1f1f1;
font-family: 'Merriweather', sans-serif;
padding: 1em;
}
h1 {
text-align: center;
color: #a8a8a8;
@include text-shadow(1px 1px 0 rgba(white, 1));
}
form {
border: 2px solid blue;
margin: 20px auto;
max-width: 600px;
padding: 5px;
text-align: center;
}
input, textarea {
border:0; outline:0;
padding: 1em;
@include border-radius(8px);
display: block;
width: 100%;
margin-top: 1em;
font-family: 'Merriweather', sans-serif;
@include box-shadow(0 1px 1px rgba(black, 0.1));
resize: none;
&:focus {
@include box-shadow(0 0px 2px rgba($red, 1)!important);
}
}
#input-submit {
color: white;
background: $red;
cursor: pointer;
&:hover {
@include box-shadow(0 1px 1px 1px rgba(#aaa, 0.6));
}
}
textarea {
height: 126px;
}
}
.half {
float: left;
width: 48%;
margin-bottom: 1em;
}
.right { width: 50%; }
.left {
margin-right: 2%;
}
@media (max-width: 480px) {
.half {
width: 100%;
float: none;
margin-bottom: 0;
}
}
/* Clearfix */
.cf:before,
.cf:after {
content: " "; /* 1 */
display: table; /* 2 */
}
.cf:after {
clear: both;
}
.half.left.cf > input {
margin: 5px;
}
为此,我使用了方法[http://www.xpertdeveloper.com/2012/10/webpage-screenshot-with-html5-js/],这里的截图是生成的,但没有样式,也没有下载。请帮忙,有没有jQuery库可供使用?
最佳答案
您可以使用以下JavaScript库来实现这一点。。。
html2canvas(网页截图)
FileSave.js(用于将屏幕截图作为图像下载)
ᴅᴇᴍᴏ
(function(exports) {
function urlsToAbsolute(nodeList) {
if (!nodeList.length) {
return [];
}
var attrName = 'href';
if (nodeList[0].__proto__ === HTMLImageElement.prototype || nodeList[0].__proto__ === HTMLScriptElement.prototype) {
attrName = 'src';
}
nodeList = [].map.call(nodeList, function(el, i) {
var attr = el.getAttribute(attrName);
if (!attr) {
return;
}
var absURL = /^(https?|data):/i.test(attr);
if (absURL) {
return el;
} else {
return el;
}
});
return nodeList;
}
function screenshotPage() {
var wrapper = document.getElementById('wrapper');
html2canvas(wrapper, {
onrendered: function(canvas) {
canvas.toBlob(function(blob) {
saveAs(blob, 'myScreenshot.png');
});
}
});
}
function addOnPageLoad_() {
window.addEventListener('DOMContentLoaded', function(e) {
var scrollX = document.documentElement.dataset.scrollX || 0;
var scrollY = document.documentElement.dataset.scrollY || 0;
window.scrollTo(scrollX, scrollY);
});
}
function generate() {
screenshotPage();
}
exports.screenshotPage = screenshotPage;
exports.generate = generate;
})(window);
@import url(https://fonts.googleapis.com/css?family=Merriweather);
$red: #e74c3c;
*,
*:before,
*:after {
@include box-sizing(border-box);
}
html,
body {
background: #f1f1f1;
font-family: 'Merriweather', sans-serif;
padding: 1em;
}
h1 {
text-align: center;
color: #a8a8a8;
@include text-shadow(1px 1px 0 rgba(white, 1));
}
form {
border: 2px solid blue;
margin: 20px auto;
max-width: 600px;
padding: 5px;
text-align: center;
}
input,
textarea {
border: 0;
outline: 0;
padding: 1em;
@include border-radius(8px);
display: block;
width: 100%;
margin-top: 1em;
font-family: 'Merriweather', sans-serif;
@include box-shadow(0 1px 1px rgba(black, 0.1));
resize: none;
&:focus {
@include box-shadow(0 0px 2px rgba($red, 1)!important);
}
}
#input-submit {
color: white;
background: $red;
cursor: pointer;
&:hover {
@include box-shadow(0 1px 1px 1px rgba(#aaa, 0.6));
}
}
textarea {
height: 126px;
}
}
.half {
float: left;
width: 48%;
margin-bottom: 1em;
}
.right {
width: 50%;
}
.left {
margin-right: 2%;
}
@media (max-width: 480px) {
.half {
width: 100%;
float: none;
margin-bottom: 0;
}
}
/* Clearfix */
.cf:before,
.cf:after {
content: " ";
/* 1 */
display: table;
/* 2 */
}
.cf:after {
clear: both;
}
.half.left.cf > input {
margin: 5px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.3/FileSaver.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.min.js"></script>
<div id="wrapper">
<h1>Scrrenshot</h1>
<form class="cf">
<div class="half left cf">
<input type="text" id="input-name" placeholder="Name">
<input type="email" id="input-email" placeholder="Email address">
<input type="text" id="input-subject" placeholder="Subject">
</div>
<div class="half right cf">
<textarea name="message" type="text" id="input-message" placeholder="Message"></textarea>
</div>
<input type="submit" value="Submit" id="input-submit">
</form>
</div>
<a class="btn btn-success" href="javascript:void(0);" onclick="generate();">Generate Screenshot »</a>