Javascript download url browser

Notice that Promise here now is the custom Promise provided by the library, not the built-in Promise. The function returns a Promise, which will resolve when all URLs were downloaded and reject if any of them fail. Now I have everything downloaded into memory.

As I mentioned above, the downloaded content is stored as Blob. The next step is to create a zip file using those Blob data. Huy Ngo. The first solution came into my mind is: Prepare the zip file on the server Upload it to a storage Give the client the URL to download it But this solution has a few drawbacks: The logic to generate a zip file is quite complicated.

I need to consider generating all files per request or combining between reusing existing files and generating new ones. Both approaches seem complicated.

They will take time to process and require a lot of effort coding, testing, and maintenance later on. It cannot utilize the feature I had already built. Use element. Remove the element from the body of the document HTML page. Attach this link to the document and simulate a click using the.

Remove this link from the document. DelftStack is a collective effort contributed by software geeks like you. If you like the article and would like to contribute to DelftStack by writing paid articles, you can check the write for us page. I had to set IE in compatibility mode to test, default charset in servlet, JavaScript options object with correct servlet path for absolute paths For non-IE browsers, it opens the file in the same window.

There are several solutions but they depend on HTML5 and haven't been implemented completely in some browsers yet. Examples below were tested in Chrome and Firefox partly works. Combining answers from owencm and Chazt3n, this function will allow download of text from IE11, Firefox, and Chrome. Sorry, I don't have access to Safari or Opera, but please add a comment if you try and it works. Just set the href attribute to "data: mimetypeheader , url ". For instance Working example: JSFiddle Demo. Because we use a Data URL, we are allowed to set the mimetype which indicates the type of data to download.

Data URLs are composed of four parts: a prefix data: , a MIME type indicating the type of data, an optional base64 token if non-textual, and the data itself. Please upvote the answer here by Yetti: saving canvas locally in IE. If you only need to actually have a download action, like if you bind it to some button that will generate the URL on the fly when clicked in Vue or React for example , you can do something as easy as this:. In my case, the file is already properly named but you can set it thanks to filename if needed.

You could try a workaround and serve the unzipped files from a Flash object, but then you'd lose the JS-only purity anyway, I'm not sure whether you currently can "drag files into browser" without some sort of Flash workaround - is that a HTML5 feature maybe?

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I know it'd be better to do it serverside, but this project is just for a bit of fun. My issue is downloading the files at the end. Can anyone think of another solution or some kind of workaround? Improve this question. The logic of our helper function can be broken down as follows:. Here is what an implementation of this helper function will look like:. That was a pretty straightforward implementation of the download link helper function. Notice that the helper triggers a one-off automatic download of the blob content whenever it is called.

Also notice that the helper function takes a filename as its second argument, which is very useful for setting the default filename for the downloaded file.

Now that we have our download helper function in place, we can revisit our previous examples and modify them to trigger a download for the generated content. Here we go. We will update the final promise. Here we have updated the final promise. Here is a working and more advanced example of this application on Codepen :. We will add some code to the end of the load event listener of the img object, to allow us:.

Here is a working example of this application on Codepen :. While there could be a lot to pick from this tutorial, it is glaring that Web APIs have a lot to offer as regards building powerful apps for the browser. Thanks for making out time to read this article. Great article! Thanks for the article! Reply 5. Glad Chinda Follow Full-stack web developer learning new hacks one day at a time.

Web technology enthusiast. Hacking stuffs theflutterwave. We made a custom demo for. No really.