function isHttpOrHttpsPrefixed (value) {
  return (
    value != null &&
    value[0] === 'h' &&
    value[1] === 't' &&
    value[2] === 't' &&
    value[3] === 'p' &&
    (
      value[4] === ':' ||
      (
        value[4] === 's' &&
        value[5] === ':'
      )
    )
  )
}
Check if the value is a valid http or https prefixed string.

@param {string} value
@returns {boolean}