Image Validation using JavaScript | File upload Validation in JavaScript

In this video I have applied different types of client side validation using javascript on an Image file.

Validation You Will Learn:
1) To check whether any file is selected or not.
2) To check Whether file is an Image or not by checking its extension.
3) To check Whether image is not more than 3 MB in size.

In Short you can say, Topics covered are:
1) File Not Empty Validation
2) Extension Validation
3) Image Size Validation

JS in-built Functions Used:
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substring() --- To cut a small string from a given string.
lastIndexOf() --- To get the last index or position of a character or string(integer value is returned).
includes() --- to match a given value from array list (boolean is returned).

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