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input file upload custom validation

iF n OnLy iF answered on December 5, 2023 Popularity 1/10 Helpfulness 1/10

answer input file upload custom validation

input file upload custom validation

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handleUpload = (e) => {
  e.preventDefault();

  let reader = new FileReader();
  let file = e.target.files[0];

  if (file && (file.size < 30000 || file.size > 5000000)) e.target.setCustomValidity('File must be 30kb to 5mb in size.');
  else e.target.setCustomValidity('');

  reader.onloadend = () => {
    this.setState({
      file,
      image: reader.result
    });
  }

  reader.readAsDataURL(file);
}

<input
onChange={this.handleUpload}
id="upload" name="upload" type="file" accept=".jpg, .jpeg" />

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: file-upload input javascript validation

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Contributed on Dec 05 2023

iF n OnLy iF

0 Answers Avg Quality 2/10

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input file upload custom validation

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