It is quite common for websites or apps to allow a user to upload files as a feature or part of a feature. For example, HTML file uploads could be used to allow users to upload avatars, or allow an internal team to upload photos of products to a website or app. In this tutorial we will briefly look at file uploads, and how to set this up in your coding. This tutorial assumes some knowledge and understanding of coding and web development. This post is meant as a brief overview. Let’s get into it!
Luckily for us, HTML provides a fairly simple solution which enables us to upload files, the <input> element! Taking a look at this, a limited example of how we’d code an upload file button in HTML could look like this:
You should see the following if you run an HTML page on a localhost server:
Choose and upload file grey button in HTML
Clicking on the Choose File button should bring up your Operating System’s file selection option.
If we wanted to customize the text within the button to something other than Choose File we could do something like:
In some instances, you may want to hide a file upload button. The way to do this typically relies on CSS.
This is one way to do it, we could attach the CSS to our input and do the following:
We would set this as the default CSS Then we would write a short Script that would change the CSS once someone selected a file, so that the user could see a Submit button, for instance.
There are a couple of other potential CSS options:
These options should be avoided, as they do not work well with accessibility readers. Opacity: 0 is the preferred method.
There is a very good chance that we would want to change the look of our file upload buttons from the rather ugly grey default buttons to something a bit more pleasing to the eye.
As one would guess, button customization involves CSS.
We know that we can put the input in the
7 tags to customize the text that appears on the button. Another method is the
Let’s try this!
This will get us a green button that will turn purple when we hover the mouse cursor over it, it should look like this:
Choose file grey and green buttons
However, we are now presented with a problem! How do we get rid of the default input option on the left (since we would only want the one custom button)? Remember how we learned how to hide buttons earlier? We can put that into practice now.
Add the following CSS to the previous CSS code:
Boom! Problem solved:
Choose file button in green
If we run this code, we will see a Choose File button. When we choose a file from our device, a browser popup box will appear. The browser popup will inform us of the filename and file type. Of course there is logic that we can write to change the type of file metadata that you gather, and what happens with it, depending on our needs.
We, of course, can think of many instances where one would want to limit which kinds of files the user can choose to upload to your server (security considerations among the many reasons to consider).
Limiting accepted file types is quite easy — to do this we make use of the accept attribute within the <input> element. An example of how we would do this is:
We can specify which specific file formats you want to accept, like we did above, or we can simply do:
There are ways you can limit formats and file types for other types of files as well, but we won’t cover everything here.
Uploadcare features a handy File Uploader feature. The Uploadcare File Uploader is responsive, mobile-ready, and easy to implement. For full details on our File Uploader please visit https://uploadcare.com/docs/uploads/file-uploader/
Once you get your Uploadcare keys, the quickest way to implement the File Uploader is via CDN like so:
And there you have it! That was a brief overview on the basics of uploading files to a server using HTML. Now get out there and try implementing what we’ve learned in a project!
How do I allow HTML to upload?
HTML allows you to add the file upload functionality to your website by adding a file upload button to your webpage with the help of the <input> tag. The <input type=”file”> defines a file-select field and a “Browse“ button for file uploads.
How do I upload a HTML file to my website for free?
How to Host a Website for Free: A Simple Guide.
Create a GitHub account..
Create a code repository..
Upload your website files to your code repository..
View your website online..
How do I upload an HTML file to my Google site?
On a computer, open a site in classic Google Sites..
Click the page you want to edit..
At the top, click Edit page ..
At the bottom of the page, click Add files..
Choose a file and click Open..