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joplin-notes/joplin notion extension/Web Development/React/Snippets/Drag and Drop File Upload.md
nm1 74ae93a96e initial
2026-11-04 00:33:23 +05:30

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Drag and Drop File Upload

react-drop-file-input-main.zip

  • JSX

    import React, { useRef, useState } from 'react';
import PropTypes from 'prop-types';

import './drop-file-input.css';

import { ImageConfig } from '../../config/ImageConfig'; 
import uploadImg from '../../assets/cloud-upload-regular-240.png';

const DropFileInput = props => {

    const wrapperRef = useRef(null);

    const [fileList, setFileList] = useState([]);

    const onDragEnter = () => wrapperRef.current.classList.add('dragover');

    const onDragLeave = () => wrapperRef.current.classList.remove('dragover');

    const onDrop = () => wrapperRef.current.classList.remove('dragover');

    const onFileDrop = (e) => {
        const newFile = e.target.files[0];
        if (newFile) {
            const updatedList = [...fileList, newFile];
            setFileList(updatedList);
            props.onFileChange(updatedList);
        }
    }

    const fileRemove = (file) => {
        const updatedList = [...fileList];
        updatedList.splice(fileList.indexOf(file), 1);
        setFileList(updatedList);
        props.onFileChange(updatedList);
    }

    return (
        <>
            <div
                ref={wrapperRef}
                className="drop-file-input"
                onDragEnter={onDragEnter}
                onDragLeave={onDragLeave}
                onDrop={onDrop}
            >
                <div className="drop-file-input__label">
                    <img src={uploadImg} alt="" />
                    <p>Drag & Drop your files here</p>
                </div>
                <input type="file" value="" onChange={onFileDrop}/>
            </div>
            {
                fileList.length > 0 ? (
                    <div className="drop-file-preview">
                        <p className="drop-file-preview__title">
                            Ready to upload
                        </p>
                        {
                            fileList.map((item, index) => (
                                <div key={index} className="drop-file-preview__item">
                                    <img src={ImageConfig[item.type.split('/')[1]] || ImageConfig['default']} alt="" />
                                    <div className="drop-file-preview__item__info">
                                        <p>{item.name}</p>
                                        <p>{item.size}B</p>
                                    </div>
                                    <span className="drop-file-preview__item__del" onClick={() => fileRemove(item)}>x</span>
                                </div>
                            ))
                        }
                    </div>
                ) : null
            }
        </>
    );
}

DropFileInput.propTypes = {
    onFileChange: PropTypes.func
}

export default DropFileInput;

     
    CSS

    .drop-file-input {
    position: relative;
    width: 400px;
    height: 200px;
    border: 2px dashed var(--border-color);
    border-radius: 20px;

    display: flex;
    align-items: center;
    justify-content: center;

    background-color: var(--input-bg);
}

.drop-file-input input {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.drop-file-input:hover,
.drop-file-input.dragover {
    opacity: 0.6;
}

.drop-file-input__label {
    text-align: center;
    color: var(--txt-second-color);
    font-weight: 600;
    padding: 10px;
}

.drop-file-input__label img {
    width: 100px;
}

.drop-file-preview {
    margin-top: 30px;
}

.drop-file-preview p {
    font-weight: 500;
}

.drop-file-preview__title {
    margin-bottom: 20px;
}

.drop-file-preview__item {
    position: relative;
    display: flex;
    margin-bottom: 10px;
    background-color: var(--input-bg);
    padding: 15px;
    border-radius: 20px;
}

.drop-file-preview__item img {
    width: 50px;
    margin-right: 20px;
}

.drop-file-preview__item__info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.drop-file-preview__item__del {
    background-color: var(--box-bg);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: var(--box-shadow);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.drop-file-preview__item:hover .drop-file-preview__item__del {
    opacity: 1;
}

     

  • For multiple file uploading use this and to limit the height of preview file list:

    import React, { useRef, useState } from "react";
  import PropTypes from "prop-types";

  import "./drop-file-input.css";

  import { ImageConfig } from "../../config/ImageConfig";
  import uploadImg from "../../assets/cloud-upload-regular-240.png";

  const DropFileInput = (props) => {
    const wrapperRef = useRef(null);

    const [fileList, setFileList] = useState([]);

    const onDragEnter = () => wrapperRef.current.classList.add("dragover");

    const onDragLeave = () => wrapperRef.current.classList.remove("dragover");

    const onDrop = () => wrapperRef.current.classList.remove("dragover");

    const onFileDrop = (e) => {
  	const newFiles = e.target.files;
  	if (newFiles.length !== 0) {
  	  const updatedList = [...fileList, ...newFiles];
  	  setFileList(updatedList);
  	  props.onFileChange(updatedList);
  	}
    };

    const fileRemove = (file) => {
  	const updatedList = [...fileList];
  	updatedList.splice(fileList.indexOf(file), 1);
  	setFileList(updatedList);
  	props.onFileChange(updatedList);
    };

    return (
  	<>
  	  <div
  		ref={wrapperRef}
  		className="drop-file-input"
  		onDragEnter={onDragEnter}
  		onDragLeave={onDragLeave}
  		onDrop={onDrop}
  	  >
  		<div className="drop-file-input__label">
  		  <img src={uploadImg} alt="" />
  		  <p>Drag & Drop your files here</p>
  		</div>
  		<input type="file" value="" multiple onChange={onFileDrop} />
  	  </div>
  	  {fileList.length > 0 ? (
  		<div className="drop-file-preview">
  		  <p className="drop-file-preview__title">Ready to upload</p>
  		  {fileList.map((item, index) => (
  			<div key={index} className="drop-file-preview__item">
  			  <img
  				src={
  				  ImageConfig[item.type.split("/")[1]] || ImageConfig["default"]
  				}
  				alt=""
  			  />
  			  <div className="drop-file-preview__item__info">
  				<p>{item.name}</p>
  				<p>{item.size}B</p>
  			  </div>
  			  <span
  				className="drop-file-preview__item__del"
  				onClick={() => fileRemove(item)}
  			  >
  				x
  			  </span>
  			</div>
  		  ))}
  		</div>
  	  ) : null}
  	</>
    );
  };

  DropFileInput.propTypes = {
    onFileChange: PropTypes.func,
  };

  export default DropFileInput;

      CSS

    .drop-file-input {
position: relative;
width: 400px;
height: 200px;
border: 2px dashed var(--border-color);
border-radius: 20px;

display: flex;
align-items: center;
justify-content: center;

background-color: var(--input-bg);
  }

  .drop-file-input input {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
  }

  .drop-file-input:hover,
  .drop-file-input.dragover {
    opacity: 0.6;
  }

  .drop-file-input__label {
    text-align: center;
    color: var(--txt-second-color);
    font-weight: 600;
    padding: 10px;
  }

  .drop-file-input__label img {
    width: 100px;
  }

  .drop-file-preview {
    margin-top: 30px;
    max-height: 70%;
    overflow-y: auto;
  }

  .drop-file-preview p {
    font-weight: 500;
  }

  .drop-file-preview__title {
    margin-bottom: 20px;
  }

  .drop-file-preview__item {
    position: relative;
    display: flex;
    margin-bottom: 10px;
    background-color: var(--input-bg);
    padding: 15px;
    border-radius: 20px;
  }

  .drop-file-preview__item img {
    width: 50px;
    margin-right: 20px;
  }

  .drop-file-preview__item__info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }

  .drop-file-preview__item__del {
    background-color: var(--box-bg);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: var(--box-shadow);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .drop-file-preview__item:hover .drop-file-preview__item__del {
    opacity: 1;
  }