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clear input file html react

e.target.value = null;

How to reset ReactJS file input

<input onChange={this.onChange} onClick={e => (e.target.value = null)} type="file" />

react reset file input

functionThatResetsTheFileInput() {
  let randomString = Math.random().toString(36);

  this.setState({
    theInputKey: randomString
  });
}

render() {
  return(
    <div>
      <input type="file"
             key={this.state.theInputKey || '' } />
      <button onClick={this.functionThatResetsTheFileInput()} />
    </div>
  )
}