Javascript _ javascript tips

This article mainly introduces how to add a row number to the Textarea text box by JS. It involves the reading and determining skills of javascript For page element nodes and has some reference value, for more information about how to add a row number to the Textarea text box in JS, see the following example. Share it with you for your reference. The details are as follows:

Here, JavaScript is used to display the row number in the Textarea text box. Each row is preceded by a serial number. If it is used to display the code, you can find a row directly. If it does not display the row number, if you want this function, you only need to set the TextArea ID and add the JavaScript code in the Code. The length and width of the text box are controlled by CSS, you can try to modify it. the length and width of the display must match the JS.

The running effect is as follows:

The Online Demo address is as follows:

Http://demo.jb51.net/js/2015/js-textarea-show-row-num-codes/

The Code is as follows:

 Add row number to the text box using Js