在 JavaScript 中,如何选择网站上的文本、复制它(通过 Control+C、Command+C 或编辑复制)并让 JavaScript 将一两行添加到剪贴板,以便当用户粘贴时,他们复制的内容是显示以及额外的行?
另外,这是否只能在一定范围内进行<div>
网站的s?如果是这样,怎么办?
我开发了一个脚本来执行此操作(并且here's关于此的博客文章):
<script>
$("body").bind('copy', function (e) {
if (typeof window.getSelection == "undefined") return; //IE8 or earlier...
var body_element = document.getElementsByTagName('body')[0];
var selection = window.getSelection();
//if the selection is short let's not annoy our users
if (("" + selection).length < 30) return;
//create a div outside of the visible area
var newdiv = document.createElement('div');
newdiv.style.position = 'absolute';
newdiv.style.left = '-99999px';
body_element.appendChild(newdiv);
newdiv.appendChild(selection.getRangeAt(0).cloneContents());
//we need a <pre> tag workaround
//otherwise the text inside "pre" loses all the line breaks!
if (selection.getRangeAt(0).commonAncestorContainer.nodeName == "PRE") {
newdiv.innerHTML = "<pre>" + newdiv.innerHTML + "</pre>";
}
newdiv.innerHTML += "<br /><br />Read more at: <a href='"
+ document.location.href + "'>"
+ document.location.href + "</a> © MySite.com";
selection.selectAllChildren(newdiv);
window.setTimeout(function () { body_element.removeChild(newdiv); }, 200);
});
</script>
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