Drag and Drop File Upload with HTML, CSS & JavaScript

02/15/2021

Contents

Demo

Full Screen

Code

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Drag and Drop File Upload</title>
    <link rel="stylesheet" type="text/css" href="https://demo.plantpot.works/assets/css/normalize.css">
    <link rel="stylesheet" href="https://use.typekit.net/opg3wle.css">
    <link rel="stylesheet" type="text/css" href="style.css">
  </head>
  <body>
    <div id="container">
      <div id="upload-area" class="form">
        <div class="upload-ui">
          <img src="ic_upload.svg" alt="">
          <h2>Drag & Drop Files<br>to Upload</h2>
          <p>or</p>
          <input id="input-upload" class="input-upload" type="file" name="file" multiple>
          <button id="btn-upload" class="btn-upload">Select Files</button>
          <div id="file-name" class="file-name"></div>
        </div>
      </div>
    </div>
    <script src="dragdrop.js"></script>
  </body>
</html>

CSS

@charset "utf-8";
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
}
body {
  background-color: #ace1ff;
  font-family: futura-pt, sans-serif;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}
#container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  width: 100%;
  height: 100vh;
  padding: 10px;
}
.form {
  width: 100%;
  max-width: 300px;
}
.upload-ui {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  border: 2px dashed #3d3935;
  padding: 20px 0;
}
.upload-ui img {
  width: 40px;
}
.upload-ui h2 {
  margin-top: 10px;
  color: #3d3935;
  font-size: 1.5rem;
  letter-spacing: 1px;
  text-align: center;
}
.upload-ui p {
  margin: 8px 0;
  font-size: 1.25rem;
}
.input-upload {
  display: none;
}
.btn-upload {
  width: 200px;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  background-color: #004b8c;
  color: #fff;
  font-size: 1.25rem;
  outline: none;
  cursor: pointer;
}
.file-name {
  margin-top: 10px;
  font-size: 1rem;
}
.dragover {
  background-color: rgba(0, 0, 0, .2);
}

JavaScript

var btn = document.getElementById('btn-upload');
var input = document.getElementById('input-upload');
var uploadArea = document.getElementById('upload-area');
var fileName = document.getElementById('file-name');

btn.addEventListener('click', () => {
  input.click();
});

uploadArea.addEventListener('dragover', (event) => {
  event.preventDefault();
  uploadArea.classList.add('dragover');
});

uploadArea.addEventListener('dragleave', (event) => {
  event.preventDefault();
  uploadArea.classList.remove('dragover');
});

uploadArea.addEventListener('drop', (event) => {
  event.preventDefault();
  uploadArea.classList.remove('dragover');
  var files = event.dataTransfer.files;
  input.files = files;
  if(files.length > 1) {
    fileName.innerHTML = files.length + "files";
  } else {
    fileName.innerHTML = files[0].name;
  }
});

input.addEventListener('change', (event) => {
  event.preventDefault();
  var files = input.files;
  if(files.length > 1) {
  fileName.innerHTML = files.length + "files";
  } else {
    fileName.innerHTML = files[0].name;
  }
});