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Drag and drop html css JavaScript | upload files page project free source code

Hey friends, today we will see how to make this great drag and drop upload files page. The demo is available at the bottom of the page.

Now let’s see the general use of this project. Sometimes you may want to collect file inputs from your website user. So this project is a nice page for user to upload files and they can also drag and drop files in this page.

Now let’s see the codes!

HTML Codes

Paste the codes below:

  <div class=“drag-area”>
    <div class=“icon”><i class=“fas fa-cloud-upload-alt”></i></div>
    <header>Drag & Drop to Upload File</header>
    <span>OR</span>
    <button>Browse File</button>
    <input type=“file” hidden>
  </div>

The output would be:

drag and drop upload files page project free source code | codewithrandom

Now let’s use CSS to style it.

CSS Codes

Paste the CSS Codes below:

  @import url(‘https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap’);
  *{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: “Poppins”, sans-serif;
  }
  body{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #0fb8ac;
  }
  .drag-area{
    border: 2px dashed #fff;
    height: 500px;
    width: 700px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }
  .drag-area.active{
    border: 2px solid #fff;
  }
  .drag-area .icon{
    font-size: 100px;
    color: #fff;
  }
  .drag-area header{
    font-size: 30px;
    font-weight: 500;
    color: #fff;
  }
  .drag-area span{
    font-size: 25px;
    font-weight: 500;
    color: #fff;
    margin: 10px 0 15px 0;
  }
  .drag-area button{
    padding: 10px 25px;
    font-size: 20px;
    font-weight: 500;
    border: none;
    outline: none;
    background: #fff;
    color: #0fb8ac;
    border-radius: 5px;
    cursor: pointer;
  }
  .drag-area img{
    height: 100%;
    width: 100%;
    object-fit: cover;
    border-radius: 5px;
  }

Now we add JavaScript for functionality

JavaScript Codes

  //selecting all required elements
const dropArea = document.querySelector(“.drag-area”),
dragText = dropArea.querySelector(“header”),
button = dropArea.querySelector(“button”),
input = dropArea.querySelector(“input”);
let file; //this is a global variable and we’ll use it inside multiple functions
button.onclick = ()=>{
  input.click(); //if user click on the button then the input also clicked
}
input.addEventListener(“change”, function(){
  //getting user select file and [0] this means if user select multiple files then we’ll select only the first one
  file = this.files[0];
  dropArea.classList.add(“active”);
  showFile(); //calling function
});
//If user Drag File Over DropArea
dropArea.addEventListener(“dragover”, (event)=>{
  event.preventDefault(); //preventing from default behaviour
  dropArea.classList.add(“active”);
  dragText.textContent = “Release to Upload File”;
});
//If user leave dragged File from DropArea
dropArea.addEventListener(“dragleave”, ()=>{
  dropArea.classList.remove(“active”);
  dragText.textContent = “Drag & Drop to Upload File”;
});
//If user drop File on DropArea
dropArea.addEventListener(“drop”, (event)=>{
  event.preventDefault(); //preventing from default behaviour
  //getting user select file and [0] this means if user select multiple files then we’ll select only the first one
  file = event.dataTransfer.files[0];
  showFile(); //calling function
});
function showFile(){
  let fileType = file.type; //getting selected file type
  let validExtensions = [“image/jpeg”, “image/jpg”, “image/png”]; //adding some valid image extensions in array
  if(validExtensions.includes(fileType)){ //if user selected file is an image file
    let fileReader = new FileReader(); //creating new FileReader object
    fileReader.onload = ()=>{
      let fileURL = fileReader.result; //passing user file source in fileURL variable
      let imgTag = `<img src=”${fileURL}” alt=”image”>`; //creating an img tag and passing user selected file source inside src attribute
      dropArea.innerHTML = imgTag; //adding that created img tag inside dropArea container
    }
    fileReader.readAsDataURL(file);
  }else{
    alert(“This is not an Image File!”);
    dropArea.classList.remove(“active”);
    dragText.textContent = “Drag & Drop to Upload File”;
  }
}