WEBAPI-clipboard
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小牛编辑
127浏览
2023-12-01
IE
IE浏览器支持直接读写剪切板内容:
window.clipboardData.clearData();
window.clipboardData.setData('Text', 'abcd');
window.clipboardData.getData('Text');
但是这种方式不安全,很容易泄露用户的隐私,所以现在浏览器如chrome都不支持这种方式了。
1.IE下,直接支持一个window.clipboardData对象,通过这个对象可以访问到粘贴板中内容。
2.chrome和firefox,在oncopy/onpaste/oncut事件对象event中有一个clipboardData对象,而在IE的事件中是没有这个对象的
Chrome
copy
// Overwrite what is being copied to the clipboard.
document.addEventListener('copy', function(e) {
// e.clipboardData is initially empty, but we can set it to the
// data that we want copied onto the clipboard.
e.clipboardData.setData('text/plain', 'Hello, world!');
e.clipboardData.setData('text/html', '<b>Hello, world!</b>');
// This is necessary to prevent the current document selection from
// being written to the clipboard.
e.preventDefault();
});
cut
// Overwrite what is copied to the clipboard.
document.addEventListener('cut', function(e) {
// e.clipboardData is initially empty, but we can set it to the
// data that we want copied onto the clipboard as part of the cut.
// Write the data that we want copied onto the clipboard.
e.clipboardData.setData('text/plain', 'Hello, world!');
e.clipboardData.setData('text/html', '<b>Hello, world!</b>');
// Since we will be canceling the cut operation, we need to manually
// update the document to remove the currently selected text.
deleteCurrentDocumentSelection();
// This is necessary to prevent the document selection from being
// written to the clipboard.
e.preventDefault();
});
paste
// Overwrite what is being pasted onto the clipboard.
document.addEventListener('paste', function(e) {
// e.clipboardData contains the data that is about to be pasted.
if (e.clipboardData.types.indexOf('text/html') > -1) {
var oldData = e.clipboardData.getData('text/html');
var newData = '<b>Ha Ha!</b> ' + oldData;
// Since we are canceling the paste operation, we need to manually
// paste the data into the document.
pasteClipboardData(newData);
// This is necessary to prevent the default paste action.
e.preventDefault();
}
});
To trigger
execCommand('cut' / 'copy' / 'paste')
clipboardData.types
Mandatory data types
- text/plain
- text/uri-list
- text/csv
- text/css
- text/html
- application/xhtml+xml
- image/png
- image/jpg, image/jpeg
- image/gif
- image/svg+xml
- application/xml, text/xml
- application/javascript
- application/json
- application/octet-stream
Asynchronous Clipboard API
read()
const items = await navigator.clipboard.read();
const textBlob = await items[0].getType("text/plain");
const text = await (new Response(textBlob)).text();
readText()
navigator.clipboard.readText().then(function(data) {
console.log("Your string: ", data);
});
write(data)
var data = [new ClipboardItem({ "text/plain": new Blob(["Text data"], { type: "text/plain" }) })];
navigator.clipboard.write(data).then(function() {
console.log("Copied to clipboard successfully!");
}, function() {
console.error("Unable to write to clipboard. :-(");
});
writeText(data)
await navigator.clipboard.writeText("Howdy, partner!");
常见用法
1:禁止复制
<script>
// 网页禁止复制 body oncopy事件中 设置 return false;
// oncopy、onpase事件: 复制、粘贴事件,可用于多数控件
// div 没有oncopy事件, body 与 文本框有这个事件
function forbidCopy() {
window.alert("网页的内容,只能看,不能动!");
return false;
}
</script>
<body oncopy="forbidCopy();" >
输入密码:
<input type="text" oncopy="window.alert('禁止复制!');return false;" />
再输入一边密码:
<input type="text" onpaste="window.alert('禁止粘贴!');return false;" />
</body>
2:点击复制指定标记中的内容
<script type="text/javascript">
function copyText(obj) {
var rng = document.body.createTextRange();
rng.moveToElementText(obj);
rng.scrollIntoView();
rng.select();
rng.execCommand("Copy");
rng.collapse(false);
alert("复制成功!");
}
function oCopy(id){
var obj=document.getElementById(id);
obj.select();
js=obj.createTextRange();
js.execCommand("Copy");
alert("代码已经被成功复制!");
}
</script>
<span id="tbid">http://pmp.www.jb51.net</span>
<a href="#" onclick="copyText(document.all.tbid)">点击复制</a>
<span id="tbid2">http://www.www.jb51.net/pmp</span>
<a href="#" onclick="oCopy(tbid2)">点击复制</a>
3:复制内容后附加信息
<script>
function SetCopyContent() {
window.event.returnValue = false;
var content = window.clipboardData.getData("Text") + "/r/n";
content += "本资源来自简书 " + this.location.href;
window.clipboardData.setData('Text', content);
alert("复制成功,请粘贴到你的QQ/MSN上推荐给你的好友");
}
</script>
<body oncopy="SetCopyContent();" >
</body>