How to get and modify input text box data using JS

This time I will show you how to use JS to obtain and modify the input text box data, and what are theprecautions for using JS to obtain and modify the input text box data. The following is a practical case. Let’s take a look. .

1 Introduction

getElementById()method.

getElementById()The method can get the HTML tag by the specified id and return it.

Syntax:

document.getElementById(id)

: Used to receive an object returned by this method.

: Used to set the id value that needs to be obtained from the HTML tag.

Second ApplicationGet the text box and modify its content

It will be displayed in the text box after the page is loaded "Initial text content", the content in the text box will be changed when the button is clicked.

Three Code

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