Javascript file upload and download

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Error Details. The question makes no assumption as to the backend techology used to upload the file. Apparently you can't do that at least with react native so I ended up using data.

NickJ NickJ 4 4 silver badges 9 9 bronze badges. Andreas Patsimas Andreas Patsimas 21 1 1 bronze badge. From Review: Hi, please don't answer just with source code. Try to provide a nice description about how your solution works. See: How do I write a good answer? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Introducing Content Health, a new way to keep the knowledge base up-to-date.

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May 19, Works on Chrome, Firefox and IE8 and above. Ismail Farooq 5, 1 1 gold badge 23 23 silver badges 43 43 bronze badges. EL missaoui habib EL missaoui habib 1, 1 1 gold badge 14 14 silver badges 24 24 bronze badges. This also works if you don't append the link to the DOM.

Unless headers returned from the server indicate to do otherwise, this will simply navigate to url , not download from it. Aaron Lelevier Aaron Lelevier Where is the download code? You're just adding an iframe — DevAB. This does not work if your filePath has a querystring since submitting a form will overwrite the querystring in the action attribute.

This also closes the websockets. This looks like a really complicated way to set window. Just window.

Regardless of whether there's a downside to this solution, per se, you haven't provided any upside to using this over a link. And there is a downside: you can't use the download attribute this way to tell the browser that you want a download regardless of what headers the server returns, which you can do with an a element.

I ended up using the below snippet and it works in most browsers, not tested in IE though. Abk Abk 1, 1 1 gold badge 19 19 silver badges 28 28 bronze badges. What's the point of using MouseEvent here instead of always using click? And why append the link to the document before clicking it? Maybe this has advantages over the simpler approach shown in stackoverflow. It's been a while I posted this answer. I can't remember if there's any reason behind those unnecessary lines of code.

Maciej Krawczyk Maciej Krawczyk 11k 5 5 gold badges 32 32 silver badges 45 45 bronze badges. La masse La masse 1, 1 1 gold badge 8 8 silver badges 24 24 bronze badges. How is this an improvement? It appears to simply be a more complicated way of doing the same thing. Urmas Repinski Urmas Repinski 1 1 silver badge 6 6 bronze badges. File is getting downloaded but its always corrupt. Any suggestions? Thank you — Shrivaths Kulkarni. Maybe just have your javascript open a page that just downloads a file, like when you drag a download link to a new tab: Window.

This creates a popup window, which most browsers block — Ashton Wiersdorf. This is just the same approach as shown in Imagine Breaker's answer years earlier, but with the added downside of requiring jQuery.

Donny V. Itamar Smirra Itamar Smirra 46 5 5 bronze badges. It just requires a little adjusting: The PHP file can call itself. I don't see the relevance here. Ifch0o1 Ifch0o1 1 1 gold badge 12 12 silver badges 31 31 bronze badges.

And it is initially hidden because we will create our custom button. This is basic CSS which sets box-sizing to border-box and removes border and padding. Then I have done some basic styling for button.

This block just adds styling to text and. This block of code just adds styling to the image preview section. And initially, it is display:none and we make it display: block with javascript when any image selected. In this block of code we are just gradding element and storing it an variable.