I have promise code, how to convert it to callback code example

Example 1: convert functoin with call back to promise

const readFilePromise = () => {
  return new Promise((resolve, reject) => {
    fs.readFile(filePath, options, (err, data) => {
      if (err) return reject(err)
      resolve(data)
    })
  })
}

Example 2: promises and not callbacks

var Button = function(content) {   this.content = content;};Button.prototype.click = function() {  console.log(this.content + ' clicked');}var myButton = new Button('OK');myButton.click();var looseClick = myButton.click;looseClick(); // not bound, 'this' is not myButton - it is the global objectvar boundClick = myButton.click.bind(myButton);boundClick(); // bound, 'this' is myButton

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Misc Example

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