javascript - 求教一个js拷贝文本的问题

就是简单的点击拷贝，好像很多网站都有复制代码这个按钮。但是好像说很多浏览器不支持，要用flash，现在这个问题一般都是怎么解决的

回复内容：

就是简单的点击拷贝，好像很多网站都有复制代码这个按钮。但是好像说很多浏览器不支持，要用flash，现在这个问题一般都是怎么解决的

long ago都是需要引入flash通过调用flash的api访问clipboard的，巨恶心..既然现在abobe自己都不推荐flash了,自然有办法。

https://zenorocha.github.io/clipboard.js/
depende on Selection and document.execCommand API

<code class="javascript"><script>
function CopyAll(T)
{
T.focus()
T.select()
if (document.all){
therange=T.createTextRange()
therange.execCommand("Copy") //复制
}
}
</script>
<input type="BUTTON" value="复制" onclick="CopyAll(text1)">
<textarea name="text1" cols="40" rows="5">(内容测试)</textarea>
<textarea cols="40" rows="5">(你可以在这里粘帖内容)</textarea></code>

he JavaScript document.execCommand('copy') support has grown, see the links below for browser updates:

IE10+ (although this document indicates some support was there from IE5.5+).
Google Chrome 43+ (~April 2015)
Mozilla Firefox 41+ (shipping ~September 2015)
Opera 29+ (based on Chromium 42, ~April 2015)
Simple Example
var copyTextareaBtn = document.querySelector('.js-textareacopybtn');

copyTextareaBtn.addEventListener('click', function(event) {
var copyTextarea = document.querySelector('.js-copytextarea');
copyTextarea.select();

try {

<code>var successful = document.execCommand('copy');
var msg = successful ? 'successful' : 'unsuccessful';
console.log('Copying text command was ' + msg);</code>

} catch (err) {

<code>console.log('Oops, unable to copy');</code>

}
});

Hello I'm some text

Copy Textarea

详见http://stackoverflow.com/questions/400212/how-do-i-copy-to-the-clipboard-in-javascript