How to allow input type=file to select the same file in react component

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I have a react component which renders a <input type="file"> dom to allow user select images from browser. I found that its onChange method not called when I select the same file. After some searching, someone suggests using this.value=null or return false at the end of the onChange method but I have tried it doesn't work.

Below is my code:

<input id="upload" ref="upload" type="file" accept="image/*"
           onChange={(event)=> { this.readFile(event) }}/>

Below is what I tried:

<input id="upload" ref="upload" type="file" accept="image/*"
               onChange={(event)=> { 
                   this.readFile(event) 
                   return false
              }}/>

Another one is:

<input id="upload" ref="upload" type="file" accept="image/*"
           onChange={(event)=> { 
               this.readFile(event) 
               this.value=null
          }}/>

I believe above solutions work for jquery but I don't know how to let it work in reactjs.

Dup of this thread

<input id="upload" ref="upload" type="file" accept="image/*"
           onChange={(event)=> { 
               this.readFile(event) 
          }}
        onClick={(event)=> { 
               event.target.value = null
          }}

/>

Controlled file input components in React | by As�s Garc�a, File input components can't be controlled in React. In React, an <input type=" file" /> is always an uncontrolled component because its value can only I mean, you have to use a native file input so the user can select files (well, she can also Multiple SSL Configurations in the Same IP/Port with HAProxy. Is there any chance to detect every file selection the user made for an HTML input of type file element?. This was asked many times before, but the usually proposed onchange event doesn't fire if the user select the same file again.

I think this in your function does not refer to input field. Try using event.target instead.

<input id="upload" ref="upload" type="file" accept="image/*"
           onChange={(event)=> { 
               this.readFile(event) 
               event.target.value=null
          }}/>

ngokevin/react-file-reader-input, button and select house.jpg. Choosing the same file doesn't trigger onChange #11 An input of type file can't be a controlled component in React because you can't set it's value attribute in HTML for security reasons. Previously we mentioned the <input type="file"> field. That works a bit differently. That works a bit differently. In this case you need to get a reference to the field by assigning the ref attribute to a property defined in the constructor with React.createRef() , and use that to get the value of it in the submit handler:

For me actually worked: event.currentTarget.value = null

    onClick={(event)=> { 
               event.currentTarget.value = null
          }}

Forms – React, An input form element whose value is controlled by React in this way is called a array into the value attribute, allowing you to select multiple options in a select tag: In HTML, an <input type="file"> lets the user choose one or more files from their However, it is built on the same principles of controlled components and� Creating a File Upload Component with React. Creating a file upload component is a common task in web development. Unfortunately it can be quite intimidating. In this tutorial you will learn how to create a working file upload component with react from scratch using no dependencies other than react itself.

Below is my solution. (Using Typescript)

import * as React from "react";

export class FileSelector extends React.Component<undefined, undefined>
{
    constructor(props: any)
    {
        super(props);
        this.handleChange = this.handleChange.bind(this);
    }

    handleChange(selectorFiles: FileList)
    {
        console.log(selectorFiles);
    }

    render ()
    {
        return <div>
            <input type="file" onChange={ (e) => this.handleChange(e.target.files) } />
        </div>;
    }
}

Uploading Files in React While Keeping The UI Completely In Sync , App.css' const Input = (props) => ( <input type="file" name="file-input" multiple Inside the form, we defined the file input component which will allow the files is where the user initially loads an array of files by selecting them� So, Let’s get started react image or file upload. Create template. To upload file we need a html template. In this template we will create `file input` element that allows to us to choose the file and a button to upload file. To create it open the `App.js` file and update the render function with the below code.

My React version: 16.2.0

@jbsmoove solution works fine for all browsers except IE11.

As for IE11, in case if we Open some file and in second time we press Cancel insteed of Open file it shows empty screen and in console we see:

Unable to get property 'name' of undefined or null reference

So I've come up with another solution which works perfect even in IE11:

<input id="upload" ref="upload" type="file" accept="image/*"
      onInput={(event)=> { 
           this.readFile(event) 
      }}
      onClick={(event)=> { 
           event.target.value = null
      }}
/>

Just use onInput instead of onChange.

Input type file react, Still using <input type="file" /> to handle file uploads in your React app? a file upload component is a common task in web development. js (the same as I have a react component which renders a <input type="file"> dom to allow user select� In HTML, an <input type="file"> lets the user choose one or more files from their device storage to be uploaded to a server or manipulated by JavaScript via the File API. < input type = " file " /> Because its value is read-only, it is an uncontrolled component in React.

HTML input multiple Attribute, Note: The multiple attribute works with the following input types: email, and file. Tip: For <input type="file">: to select multiple files, hold down the CTRL or SHIFT � Using type="file" and accept="image/*" (or the format you want), allow the user to chose a file with specific format. But you have to re check it again in client side, because the user can select other type of files. This works for me.

How to Create a Simple Form Submit with Files, We can quickly create a simple form with a submit button to allow file upload. < div> <h2>File upload using form in React</h2> <hr /> <div> <form> form element, the input element is a type of file that allows us to select the� With React JS and TypeScript I found that I prefer to use the arrow function with the onChange attribute on the input element. From there you can access the files and pass them to a function.

<input type="file">, input elements with type="file" let the user choose one or more files from their is specified, the file input allows the user to select more than one file. of file that may be selected by the user in an <input> element of type file . This article explains a simple way to implement the approach to upload a single file with React. The process of uploading an image can be broadly divided into two steps: Select a File (user input): To enable the user to pick a file, the first step is to add the tag to our App component. This tag should have the type attribute set as “file”.

Comments
  • This is just browser behaviour not to do with react, the file didn't change. See stackoverflow.com/questions/4109276/…
  • Does this answer your question? HTML input file selection event not firing upon selecting the same file
  • This worked for me! I do recommend not using inline functions but the concept works.
  • With TypeScript, event.target.value = null I got the compilation error TS2322: Type 'null' is not assignable to type 'string'. But I was able to say event.target.value = "" and that worked as per stackoverflow.com/a/56258902/2848676
  • I just tried but it doesn't work. the onChange method is not triggered when selecting the same file on the second time.
  • use onInput instead of onChange
  • Setting event.target.value=null worked for me, thanks!
  • Isn't this answering missing the point in that it should call event.target.value = "". Or more specifically <input alt="Upload Demand" type="file" onChange={ (ie) => {this.handleUploadDemand(ie); ie.target.value = ""}}/>}