Uploading a JSON file and using it

Question

How can I upload a JSON file on some click on a button on my web page say \"import\", and use it to store in a variable to use and update it using JavaScript.

I have

Answer 1

Try this, works perfect

handleUploadFile = async(doc) => {
  let file = doc.target.files[0]
  let reader = new FileReader(file)

  // await reader.readAsDataURL(file)

  reader.readAsText(file)

  reader.onload = async(e) => {

    let aaa = e.target.result

    let content = await JSON.parse(aaa)
    console.log(content)

  }
}