Input Form Field Suggestions with HTML and JavaScript
Input suggestions can be coded with HTML only and options populated with JavaScript.
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Upload Multiple Files using the Fetch API
Learn how for both an input the 'multiple' attribute and with multiple input elements.
Get the size of a file in JavaScript
First get the data in blob or blob-like format and then access its size property.
How to Get the File Extension from a Filename String
You can combine lastIndexOf() and slice() to get the file extension.
Compress an Image File in the Browser with JavaScript
Using the HTML5 Canvas API, you can do image compression on the frontend.
Download Progress with JavaScript’s Fetch Function
Create a download indicator by reading the body of the response.
Set an Expiration Date and Time for a localStorage Item
There is no native expiration option but it can be implemented using timestamps.
Store and Retrieve a Function in localStorage
Pass a function through localStorage using the Function constructor object.
JSON file to CSV download with vanilla JavaScript
Allow your users to download any fetchable JSON file in CSV format.
Social Media Share Buttons with Vanilla JavaScript
Share with vanilla JavaScript by constructing URL requests to social media APIs.
