JavaScript increment counter number on button click | Example code

The purist way to do this would be to add event handlers to the button, to increment a counter number in JavaScript.

JavaScript increment a counter examples

HTML examples code with ‘Plain‘ JavaScript:-

1. Increment number variable value

Create a JavaScript variable and increment that variable when press a button (without submit the form).

Counterexample: how to increment a JavaScript variable based on a web page button press event.


JavaScript increment counter number on button click

2. Increment element value

Let’s make a counter variable that increases the value when you click a button. We are using two elements in HTML.

First text and second id button, on clicking a button text input will increase current value by one.


Increment HTML element value JavaScript

Do comment if you have any doubts and suggestions on this topic.

Note: All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version

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