Home > Article > Web Front-end > Let’s take a look at how JavaScript gets the selected text on the page
A little trick introduced here is how to use JavaScript to get the selected text on the page. The most critical JavaScript API is:
event.selection = window.getSelection();
The selection here is actually an object, but if we use .toString() or force conversion to a string, we The selected text will be obtained.
$(document).ready(function () {
$(".contenttext").mouseup(function (e) {
var txt;
var parentOffset = $(this).offset();
var x = e.pageX - parentOffset.left;
var y = e.pageY - parentOffset.top;
txt = window.getSelection();
if (txt.toString().length > 1) {
alert(txt);
}
});
});If we place this code into the following page:
<html> <head> <title>Get selected text with JavaScript</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="http://www.webhek.com/wordpress/wp-includes/js/jquery/jquery.js" type="text/javascript"></script> </head> <body> <p class="contenttext"> 和客户端的 JavaScript 不同的是，PHP 代码是运行在服务端的。如果您在您的服务器上建立了如上例类似的代码，则在运行该脚本后，客户端就能接收到其结果，但他们无法得知其背后的代码是如何运作的。您甚至可以将 WEB 服务器设置成让 PHP 来处理所有的 HTML 文件，这么一来，用户就无法得知服务端到底做了什么。 使用 PHP 的一大好处是它对于初学者来说及其的简单，同时也给专业的程序员提供了各种高级的特性。当您看到 PHP 长长的特性列表时，请不要害怕。您可以很快的入门，只需几个小时您就可以自己写一些简单的脚本。 </p> </body> </html>
When you select part of the text on the page with the mouse, you will get the selected content at the same time. I use it here alert() method displays it.
Recommended tutorial: "javascript basic tutorial"
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