File download code javascript

In this article, we will learn how to download files using JavaScript. Automatic downloading files help us retrieve files directly from the URL with a JavaScript function without contacting any servers. We will achieve this using our custom written functions and using the download attribute of HTML 5.

The download attribute in HTML 5 is used to download files when users click on the hyperlink. We are required to set the href attribute specifying the source of the file. The value of the download attribute determines the name of the downloaded file. However, the download attribute only works in modern browsers.

Internet Explorer does not support it. The idea is to programmatically create an anchor link, and then trigger the click event. This method is especially helpful for dynamically generated file URLs.

Sometimes, you may want to save programmatically generated data as a file using JavaScript. That's where blobs and object URLs are useful. You can download the code file in link attached with this article. Further we will see how we can use an ajax call for the same.

Now this is the main step which is problematic in most cases. It is verfy tricky to download a file content ' blob ' as a file and save it as a zip. For this I have added a script reference filesaver. Below is the full code. For more detail on this, you can read this Stackoverflow link.

You can convert as many as file you want into a single zip and push to client machine. You bandwidth is saved. You can also save a MemoryStream object to zip and download that. It includes but is not limited to multimedia objects , programs , and code snippets. Remember: as Blob has size limitations based on the supported browser, FileSaver. See the table below to check the compatibility of FileSaver. Learn easily by using our HTML5 canvas examples. Learn Bootstrap: this Bootstrap 4 tutorial will easily teach you how to use it for your mobile web design.

Learn Bootstrap quickly to become a master. Code has been added to clipboard! Reading time 3 min. Contents 1. What are automatic downloads with JavaScript? Making JavaScript download files without the server 3. Using FileSaver. What is a Blob?