Checking file size in JavaScript is a common task when working with files. It allows you to determine if a file is too large to upload or process, or if it meets specific size requirements. There are several methods to check file size in JavaScript, each with its own advantages and disadvantages.
One common method is to use the `File` object’s `size` property. This property returns the size of the file in bytes. However, this method only works for files that have already been loaded into memory.