How to reset ReactJS file input

Question

I have file upload input:

And I handle upload t

Answer 1

You can also include this in your input element if you know you are not going to be using the built-in file input value at all.

<input value={""} ... />

This way the value is always reset to the empty string on render and you don't have to include it awkwardly in an onChange function.

Answer 2

I think you can just clear the input value like this :

e.target.value = null;

File input cannot be controlled, there is no React specific way to do that.

---

Edit For old browsers (<IE11), you can use one of the following techniques.

See http://jsbin.com/zurudemuma/1/edit?js,output (tested on IE10 & 9)

Answer 3

Here is my solution using redux form

class FileInput extends React.Component {
  constructor() {
    super();

    this.deleteImage = this.deleteImage.bind(this);
  }

  deleteImage() {
    // Just setting input ref value to null did not work well with redux form
    // At the same time just calling on change with nothing didn't do the trick
    // just using onChange does the change in redux form but if you try selecting
    // the same image again it doesn't show in the preview cause the onChange of the
    // input is not called since for the input the value is not changing
    // but for redux form would be.

    this.fileInput.value = null;
    this.props.input.onChange();
  }

  render() {
    const { input: { onChange, value }, accept, disabled, error } = this.props;
    const { edited } = this.state;

    return (
      <div className="file-input-expanded">
        {/* ref and on change are key properties here */}
        <input
          className="hidden"
          type="file"
          onChange={e => onChange(e.target.files[0])}
          multiple={false}
          accept={accept}
          capture
          ref={(input) => { this.fileInput = input; }}
          disabled={disabled}
        />
        {!value ?
          {/* Add button */}
          <Button
            className="btn-link action"
            type="button"
            text="Add Image"
            onPress={() => this.fileInput.click()}
            disabled={disabled}
          />
          :
          <div className="file-input-container">
            <div className="flex-row">
              {/* Image preview */}
              <img src={window.URL.createObjectURL(value)} alt="outbound MMS" />
              <div className="flex-col mg-l-20">
                {/* This button does de replacing */}
                <Button
                  type="button"
                  className="btn-link mg-b-10"
                  text="Change Image"
                  onPress={() => this.fileInput.click()}
                  disabled={disabled}
                />
                {/* This button is the one that does de deleting */}
                <Button
                  type="button"
                  className="btn-link delete"
                  text="Delete Image"
                  onPress={this.deleteImage}
                  disabled={disabled}
                />
              </div>
            </div>
            {error &&
              <div className="error-message"> {error}</div>
            }
          </div>
        }
      </div>
    );
  }
}

FileInput.propTypes = {
  input: object.isRequired,
  accept: string,
  disabled: bool,
  error: string
};

FileInput.defaultProps = {
  accept: '*',
};

export default FileInput;

Answer 4

I do it by updating key inside my file input. This will force a re-render and previously selected file will go away.

<input type="file" key={this.state.inputKey} />

Changing the state inputKey will re-render the component. One way to change the inputKey will be to always set it to Date.now() on click of a button which is supposed to clear the field.