Javascript button upload files

Javascript button upload files

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How to create a custom file upload button

I find the default HTML file upload button rather ugly. Annoying enough, there seems to be no way to style it directly. Here is how I created a custom file upload button.

1. Use a label tag and point its for attribute to the id of the default HTML file upload button

  type="file" id="actual-btn"/>  for="actual-btn">Choose File 

By doing this, clicking the label element in the browser toggles the default HTML file upload button (as though we clicked it directly). The output of the above code is below. As you can see, we only have a Choose File text (from the label element) a few pixels to the right of the actual upload button. We can click the Choose File text, and it will toggle the upload window (Click it and see)

2. Style the label element and hide the default HTML file upload button

We hide the default HTML file upload button in the browser by adding the hidden attribute to the tag like so

 type="file" id="actual-btn" hidden/> 

label  background-color: indigo; color: white; padding: 0.5rem; font-family: sans-serif; border-radius: 0.3rem; cursor: pointer; margin-top: 1rem; > 

Now we have this beautiful custom button, which actually works like the original file upload button: At this point, we are done. But there is one more glitch to fix. With the default file upload button, there is a no file chosen text beside the button (scroll up to the first codepen window), which gets replaced with the name of the file we will be uploading. Unfortunately, we don’t get to see that with our custom button. How do we do that? What I did was to include a span tag (with an id of file-chosen) right after our custom file upload button. In the javascript file, I listen to the change event on the original file upload button(which we have hidden). A file object is returned which contains the details(such as name, file size etc) of the file uploaded. Then I set the text content of the span element(with the id of file-chosen) to the name property of the file object returned. The final result is below. Test it out. Kindly leave your comments and questions down below

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Upload File on Button Click with Preview Using JavaScript

Hello, Guys. Welcome to Our Blog, In today’s article, we’ll look at how to make an Upload File on Button Click with Preview using HTML, CSS, and JavaScript. Before that, we could see what this endeavor was about.

In This Project, We First Upload A File Using Upload Button Or Drag And Drop Method Then We Will Enter Our Email Address To Send That File, So The File Which Is Sent Will Appear In The Box.

The ability to drag and drop a file into position is referred to as drag-and-drop file upload. Using drag-and-drop interfaces, web apps can place files onto a web page. This type of file upload function is probably available on most websites. In this blog post, I’ll demonstrate how to implement a drag-and-drop file upload function using only pure JavaScript. There are several JavaScript frameworks that enable you to do this with just a few lines of JavaScript code.

So, Let’s Begin Our Project Journey By Adding The Source Codes. For That, We Are Using The Html Code First.

Do you want to learn HTML to JavaScript? 🔥

If yes, then here is our Master Frontend: Zero to Hero eBook! 📚 In this eBook, you’ll learn complete HTML, CSS, Bootstrap, and JavaScript from beginner to advance level. 💪 It includes 450 Projects with source code.

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How to make a custom file upload button with HTML, CSS, and JavaScript

Recently, I was working on a project. One of the requirements was to create a customized file upload button. I had to make something like this:

I thought I’d easily find a detailed tutorial if I search a bit on Google but unfortunately, I didn’t. It seems to be quite simple but I had to spend a lot of time to make it.

This article is a detailed tutorial on how to make it 🙂

Let’s get started!

I’m gonna make this a beginner-friendly article, so, first of all, let’s start with the basics. Create an HTML file, I’ve named it Index, you can name it anything. Now create a .css file. I’ve named it style.css following the convention. Since we’re done with the HTML and CSS ones, let’s make a .js file now. I’ve named it script.js, again, following the concention.

Now, set up your main tags such as < !DOCTYPE html >, < head >, < body >etc in your HTML file. Then we will connect our CSS and js file with the HTML file. I’m doing this early on because my experience states that it’s better to be early. You might forget to make the connection later and spend hours trying to why your code isn’t working🤦‍♀️

Connecting .css and .js file

Add the following line in the < head >tag of your HTML file to connect with the css file. Make sure that the .css, .html and .js files are all in the same folder.

link rel="stylesheet" href="style.css"> 

I’m also gonna add an icon on the browse for a file button. I’ll use fontawesome for it. To do so, we gotta connect it. So, add the following link in the < head >tag as well.

link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css" integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous"> 

Finally, this is what your < head >tag should look like:

head> meta charset="UTF-8"> meta http-equiv="X-UA-Compatible" content="IE=edge"> meta name="viewport" content="width=device-width, initial-scale=1.0"> title>File Upload Button/title> link rel="stylesheet" href="style.css"> link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css" integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous"> /head> 

Just before < body >tag is closed, add this line to connect the .js file:

HTML Code

Let’s play with some divs and classes, shall we?👀

First, make the main div under which all your content will be. Then add a class to it so that styling it is much easier.

div class="up"> !-- Code here --> /div> 

From here onwards, I’ll start to refer to the divs with their class name.

Now, we have to make 2 more divs inside the «up» div.

One would be where the name of the selected file would be shown. The second div would be for the browse file button.

So, here’s the first div:

div class="fileName"> a>NO FILE SELECTED/a> /div> 

The text in < a >would be the default text shown. Once the file is selected, its name would be shown in place of this default text (this is what we would use Js and jQuery for).

Here’s the second div:

 div class="file-search-button"> label for="file-upload" class="custom-file-upload"> i class="fa fa-search">/i> BROWSE FOR A FILE /label> input id="file-upload" type="file"/> /div> 

The < label >tag is for the < input >. We gave the id «file-upload» to the < input >. Then, via using this id, we specified that the label was for this input only. This is a good practice and avoids confusion when you got a lot of < input >and < label >tags inside one < div >. In the < input >tag, we added type=»file» to specify that this button can be used to upload anything (any kind of file like.png, .jpeg, .exe, .pdf etc).

» < i >< /i >«, by adding this, an icon indicating «search» would be added before our text.

Adding everything up, here’s what we will get:

body> div class="up"> div class="fileName"> a>NO FILE SELECTED/a> /div> div class="file-search-button"> label for="file-upload" class="custom-file-upload"> i class="fa fa-search">/i> BROWSE FOR A FILE /label> input id="file-upload" type="file"/> /div> /div> script src="script.js">/script> /body> 

So, this is how things look at this point:

CSS Code

It looks quite plain, so let’s style this 🙂

Add all the following code in the style.css file.

First of all, we will style the main div, «up». I want to place it in the center of the page so here’s what I’ll do:

.up< margin: 0 auto; text-align: center ; margin-top: 200px; > 

So, here is something really important. Take a look:

The text in the red circle is what is shown by default. Generally, this can’t be styled. At least I couldn’t do it. I couldn’t change its placement and it looked really bad right next to a beautiful button.

I only wanted the text in the green circle to be shown. That text would be later replaced by the name of the file selected.

So, in order to make the text in red disappear, we do the following:

 input[type="file"] < display: none; > 

Since we’re done with this, let’s style the first div, «fileName».

 .fileName< margin-top: 20px; color: rgb(255, 255, 255); display: inline-block; padding:15px; border-radius: 25px; cursor: pointer; background-color: #737275; border: none; width: 220px; > 

Here, we have added some padding and colors, etc to make it look a bit similar in shape and styling to the browse file button.

To make sure, the 1st and second div have some space between them, we’ll do this:

 .file-search-button< margin-top: 30px; > 

Now, we’ll style the browse file button:

 .custom-file-upload < color: rgb(255, 255, 255); display: inline-block; padding:15px; border-radius: 25px; cursor: pointer; background-color: #7a166d; border: none; > 

This styling was some pretty basic stuff. Here’s how it looks right now:

It’s in the middle of the page and with the basic styling we did earlier, looks much better now 🙂

JavaScript Code

Add the following code in the script.js file.

const fileName = document.querySelector(".fileName"); const fileInput = document.querySelector("input[type=file]"); fileInput.addEventListener("change", function( ) < if (this.files && this.files[0]) < fileName.innerHTML = this.files[0].name; > >); 

It’s pretty simple actually. We will first select the «query» via its class. Then we add an event listener that as soon as the button is clicked, the below-defined function would be called. What it does is that as soon as the button is clicked, the user is given the option to select a file. If no file is selected, no change would take place. But if a file is selected, the name would be stored in a variable and replace the default text!

How it works!

When we click on the browse for a file button, this new window pops up. Select a file now.

And here we can see that it works😆

Full Code

You can either follow along while reading or get the full code from my Github.

Let’s connect!

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