比如说我复制的
123456
最后出现的是
著作权归作者所有。
商业转载请联系作者获得授权，非商业转载请注明出处。
作者：stevenliuyi
链接：http://www.zhihu.com/question/20451870/answer/15168034
来源：知乎
123456
回复内容：
比如说我复制的
123456
最后出现的是
著作权归作者所有。
商业转载请联系作者获得授权，非商业转载请注明出处。
作者：stevenliuyi
链接：http://www.zhihu.com/question/20451870/answer/15168034
来源：知乎
123456
大体思路：
答案区域监听
copy事件，并阻止这个事件的默认行为。获取选中的内容（
window.getSelection()）加上版权信息，然后设置到剪切板（clipboardData.setData()）。
下面的代码实现了一个简单的DEMO
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
</head>
<body>
<div id="answer">测试数据<b>test</b></div>
<script>
function setClipboardText(event){
event.preventDefault();
var node = document.createElement('div');
//对documentfragment不熟，不知道怎么获取里面的内容，用了一个比较笨的方式
node.appendChild(window.getSelection().getRangeAt(0).cloneContents());
var htmlData = '<div>著作权归作者所有。<br />'
+ '商业转载请联系作者获得授权，非商业转载请注明出处。<br />'
+ '作者：tiantian<br />链接：http://segmentfault.com/u/tiantian_<br />'
+ '来源：segmentfault<br /><br />'
+ node.innerHTML
+ '</div>';
var textData = '著作权归作者所有。\n'
+ '商业转载请联系作者获得授权，非商业转载请注明出处。\n'
+ '作者：tiantian\n链接：http://segmentfault.com/u/tiantian_\n'
+ '来源：segmentfault\n\n'
+ window.getSelection().getRangeAt(0);
if(event.clipboardData){
event.clipboardData.setData("text/html", htmlData);
event.clipboardData.setData("text/plain",textData);
}
else if(window.clipboardData){
return window.clipboardData.setData("text", textData);
}
};
var answer = document.getElementById("answer");
answer.addEventListener('copy',function(e){
setClipboardText(e);
});
</script>
</body>
</html>
看了知乎的代码，大致也是这么实现的，但是还加入了一些其他的判断，比如如果答案设置了不能复制，则阻止copy事件，并显示提示信息，如果复制的文本长度小于42的话，不会加上版权信息。
copy事件可以参考：
https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/oncopy
http://codebits.glennjones.net/editing/setclipboarddata.htm
没有这个问题啊
Optimize PHP Code: Reducing Memory Usage & Execution TimeMay 10, 2025 am 12:04 AMTooptimizePHPcodeforreducedmemoryusageandexecutiontime,followthesesteps:1)Usereferencesinsteadofcopyinglargedatastructurestoreducememoryconsumption.2)LeveragePHP'sbuilt-infunctionslikearray_mapforfasterexecution.3)Implementcachingmechanisms,suchasAPC
PHP Email: Step-by-Step Sending GuideMay 09, 2025 am 12:14 AMPHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct
How to Send Email via PHP: Examples & CodeMay 09, 2025 am 12:13 AMThe best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.
Advanced PHP Email: Custom Headers & FeaturesMay 09, 2025 am 12:13 AMCustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr
Guide to Sending Emails with PHP & SMTPMay 09, 2025 am 12:06 AMSending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.
What is the best way to send an email using PHP?May 08, 2025 am 12:21 AMThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu
Best Practices for Dependency Injection in PHPMay 08, 2025 am 12:21 AMThe reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.
PHP performance tuning tips and tricksMay 08, 2025 am 12:20 AMPHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
Zend Studio 13.0.1
Powerful PHP integrated development environment
SublimeText3 Linux new version
SublimeText3 Linux latest version
