React dropzone accept pdf

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Simple React hook to create an HTML5-compatible drag'n'drop area for files. Documentation and examples in . The source code in . Install it from npm and include it in the React build process (using Webpack, Browserify, etc.). npm install --save react-dropzone or: Usage You can use the hook: import React useCallback from 'react'import useDropzone from 'react-dropzone' const getRootProps getInputProps isDragActive <p>Release files here ... </p> : <p>Drag 'n' drop some files here or click to select the IMPORTANT</p> files: Under the hood, this lib uses hooks, and then uses > 16.8. Or the wrapper component for the hook: import React from 'react'import Dropzone from 'react-dropzone' getRootProps getInputProps <p>Drag 'n' drop some files here or click to select files</p> Warning: In newer versions of the browser, files provided by onDrop will not have the property path or fullPath, see this SO question and this issue. Additionally, if you want to access the contents of the file, you must use the FileReader API: import React useCallback from 'react'import useDropzone from 'react-dropzone' const getRootProps getInputProps <p>Drag 'n' drop some files here or click to select the files</p> Dropzone Props Getters Dropzone property getters are just two functions that return objects with properties that you must use to create the drop area 'n' of drag. Root properties can be applied to any desired element, while input properties must be applied to an <input>: React import from 'react'import useDropzone from 'react-dropzone' const getRootProps getInputProps <p>Drag 'n' drop some files here or click to select files</p> Note that any other properties that you want to add to the element where the properties are set by getRootProps(), you should always pass them through that function instead of applying them to the element itself. This is to prevent properties from being overridden (or override properties returned by getRootProps()): In the previous example, the provided handler of ,onClick, will be invoked before the internal one, so internal callbacks can be prevented simply by using stopPropagation. For more examples, see Events. Important: If you omit to render an <input> and/or bind properties from getInputProps(), opening a file dialog box will not be possible. Rifs Both getRootProps and getInputProps take a custom refKey (the default is ref) as one of the attributes passed into the parameter. This can be useful when the item you are trying to the property tips from one of these fns does not expose a reference to the element. for example: import React from 'react'import useDropzone from 'react-dropzone'import styled from 'styled-components'const StyledDiv ' styleddiv' const getRootProps getInputProps <p>Drag 'n' release some files here or click to select files</p> If you are working with the material UI and want to apply root root props some components that do not expose a reference, use RootRef: import React from 'react'import useDropzone from 'react-dropzone'import RootRef from '@material-ui/core/RootRef' const getRootProps getInputProps <p>Drag 'n' drop some files here or click to select the files</p> Important: Do not set the ref prop on the elements where the getRootProps()/getInputProps() properties are set, instead, get references from the hook itself: import React from 'react'import useDropzone from 'react-dropzone' <p>Drag 'n' drop some files here or click to select the files</p> however if you are using the <dropzone> component you can set the prop reference to the component itself that will expose the open property that can be used to open the file dialog box at the : Import React createRef from 'react'import Dropzone from 'react-dropzone' getRootProps getInputProps <p>Drag 'n' drop some files here or click to select files</p> Important test: react-dropzone makes some of its drop callbacks 'n' asynchronous to enable promise-based getFilesFromEvent() functions. To test components that use this library, you can use the reaction test library: const event - type bubbles: true Note: Using Enzyme for testing is currently not supported, see #2011. Other examples can be found in react-dropzones test groups. Support support supporters Support us with a monthly donation and help us continue our activities. [Become a backer] Sponsors become sponsors and get your logo on our README on Github with a link to your site. [Becoming a sponsor] MIT license I inherited a code base that is React.JS on the front end and Node.JS/Express.JS on the back end on an AWS EC2 instance server. The code I used react-dropzone ( and was made to take only drag&drop image files. The owner of the product I'm working on now wants me to accept all the files (.pdf's, .docx, .xlsx, etc.). I wonder how to get him to accept all the files? I went through react-dropzone documents and still have to find some examples to show how to get it accepted all kinds of files? It's as simple as setting the accept... from accept : image/ to accept can the string to accept ... be an array, for example: accept : [image/, text/ ,...], etc.? what is the correct way to get react-dropzone to accept any type of file? The following is code for my onDrop , onDrop , (acceptedFiles, rejectedFiles) , > , callback, which allows files to accept > files, leave data , new FormData(); data.append(file, file); let item - await axios .post(triage/upload, data, Headers: X-Requested-With: XMLHttpRequest, Content-Type: > . : response.data.filename :); .catch(err -> - let rejects : rejectedFiles.map(asynchronous file : > - let data - new FormData(); await data.append(file, file); console.log(There was an error trying to add </Dropzone> </Dropzone> files:, err); console.log(The files that were rejected were:, rejects.join('')) return item; }); Promise.all(files) .then(completed .> : console.log(completed), let fileNames - completed.map(function(item) - return item[filename]>; } ... and here's the code for himself in the same file); - Export the default app; React Dropzone requires only one method passed in the onDrop property to handle files when they are selected. To keep things simple, the method will be named the same as the prop: onDrop.Our onDrop method has a single parameter, acceptedFiles, which for the time we log on to the console. This is for testing purposes only. Save the component, open your browser, and go to the react app that's running. Click the text label and a file picker window will open! Great! We have a basic file selection that works. Clicking a file to upload won't do anything yet. For it to work, we need to send the file to a server, which we will cover later. Let's keep exploring what else React Dropzone can do! Render PropsDropzone may look different from other React components seen. This is because it uses the Render Props technique. The Render Prop function is used to modify HTML within the Dropzone component, based on the current state of Dropzone.To, add a variable to the Render Prop function called isDragActive. This gives us access to dropzone's current drag state. Now that we have access to the isDragActive state, we can change the label text value to show something different when a file is dragged onto the component.<Dropzone ondrop={this.onDrop}> (getRootProps, getInputProps, isDragActive) : > ( <div {... getrootprops()}=><input {... getinputprops()}=> - IsDragActive ? Drop it like it's hot! : 'Click me or drag a file to load it!' </div> ) In the </Dropzone>previous code, we are writing an inline conditional that checks whether isDragActive is true. If it is, write Drop it like it's hot, otherwise write, Click on me or drag a file to upload!. Let's go back to the browser and see it in action. By allowing specific types of files At present, our file picker allows us to choose any type of file to upload. Depending on what you use a file picker for, you can allow specific types of files, such as only . JPG, or just . XLS and . Docx. To do this, we will use the acceptance prop. Let's add the accept prop object after onDrop within the Dropzone component declaration, like this:<Dropzone ondrop={this.onDrop} accept=image/png, image/gif> ... </Dropzone> File types are written as MIME types, with multiple values separated by a comma. Mozilla has a great resource that provides a complete list of MIME types. We improve the file picker user experience by showing a message if the user tries to upload a file type that is not accepted. To do this, we will add another rendering property called isDragRejected. We'll move around the inline conditional logic somehow to take into account this new di rendering.<Dropzone ondrop={this.onDrop} accept=image/png> (getRootProps, getInputProps, isDragActive, isDragReject) : > ( <div {... getrootprops()}=><input {... getinputprops()}=> &gt; &gt; fare clic qui o rilasciare un file da caricare! IsDragActive &&gt;isDragReject &&gt; Abbandonarlo come se fosse caldo! IsDragReject &&gt; Tipo di file non accettato, spiacenti! </div></Dropzone> </div></Dropzone> ) Save the file, return to your browser, and try dragging a . JPG in the file picker. A message appears informing the user that the file picker does not accept that file type. Perfect! Minimum and maximum file sizeSpecifies the minimum and maximum file size is very important. In a real-world file uploader, you wouldn't want one of your users dragging a 1GB file to upload and paralyze your server. Fortunately we can limit the size of the file that is uploaded to React Dropzone through two props, minSize and maxSize. Both of these properties take a numeric value specified in bytes. For reference, 1 Megabyte 1048576 Byte.Jump back into code and add the two minSize and maxSize props to the Dropzone component, just below the accept property. <Dropzone ondrop={this.onDrop} accept=image/png minsize={0} maxsize={5242880}> ... </Dropzone> We are accepting a file with a maximum size of 5MB and below in the previous example. We add another code to our file input component that controls the maximum file size and displays an error message if the file to upload is larger.<div classname=text-center mt-5><Dropzone ondrop={this.onDrop} accept=image/png minsize={0} maxsize={maxSize}> (getRootProps, getInputProps, isDragActive, isDragReject, rejectedFiles) : > const isFileTooLarge , rejectedFiles.length > 0 &gt; .size > maxSize; return ( <div {... getrootprops()}=><input {... getinputprops()}=> &gt; &gt; click here or release a file to upload! IsDragActive &&gt;isDragReject

&&gt; Abandon it like it's hot! IsDragReject &&gt; File type not accepted, sorry! IsFileTooLarge &gt; ( <div classname=text-danger mt-2> The file is too large. </div> )} </div>)} } </Dropzone></div> ); It might seem like we've added a lot, but it's actually less than 10 lines. At the top of the rendering method, we declare a new const called maxSize and set it to 1 MB. Refer to this new maxSize variable in the maxSize property within Dropzone.Let's add another dropzone rendering property called rejectedFilesDirectly under the render prop function within Dropzone, declare another const called isFileTooLarge, which gets the first file from the rejectedFiles array property, and checks to see if the size is larger than the maxSize variable. Finally, we are writing an inline conditional that checks whether isFileTooLarge is true and renders 'File is too big.' in red. Let's see him in action! Multiple filesThe last feature of React Dropzone that we will cover is the ability to upload multiple files. This is quite simple, as we are not adding code within the render prop function. Just the multiple property to the react dropzone component declaration, like this:<Dropzone ondrop={this.onDrop} accept=image/png minsize={0} maxsize={maxSize} multiple=> ... </Dropzone> React Dropzone using HooksSincendo writing this React Hooks tutorial have been officially released, and the react-dropzone library has been to include a custom useDropzone hook. Therefore, I re-wrote the entire App.js as a functional component using the custom useDropzone hook provided by react dropzone:import React, useCallback from 'react'; import , useDropzone , from 'react-dropzone' const App , () > const maxSize , 1048576; const onDrop , useCallback(acceptedFiles , > , console.log(acceptedFiles); []); const : isDragActive, getRootProps, getInputProps, isDragReject, acceptedFiles, rejectedFiles , useDropzone('onDrop,accept: 'image/png', minSize: 0, maxSize, '); const isFileTooLarge - rejectedFiles.length > 0 &gt;; <div classname=container text-center mt-5><div {... getrootprops()}=><input {... getinputprops()}=> &gt; &gt; click here or release a file to upload! IsDragActive &&gt;isDragReject &&gt; Abandon it like it's hot! IsDragReject &&gt; File type not accepted, sorry! IsFileTooLarge &gt; ( <div classname=text-danger mt-2> The file is too large. </div> )} </div></div> ); }; export the default app; Show a list of accepted filesA nice touch that we could add to our reaction dropzone component is to see a list of accepted files before uploading them. It's quite a bit of experience that goes a long way to add to the experience. The hook useDropzone provides a variable, acceptedFiles, which is an array of File objects. We could map through that array and display a list of all the files that are ready to load:... <ul classname=list-group mt-2> :acceptedFiles.length > 0 &gt; acceptedFiles.map(acceptedFile - > ( <li classname=list-group-item list-group-item-success> -acceptedFile.name </li> ))} </ul> ... Wrapping Us you have! A simple file picker component created using React Dropzone. If you liked the tutorial or came across any issues, don't forget to leave a comment below.

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