US Phone Number Validation - Help Needed

JavaScript
2

I changed my code to this after reading the hints here (I haven’t looked at the solutions yet and I’m trying to not look):

function telephoneCheck(str) {
  let hasTenDigits = false;
  let hasElevenDigits = false;
  let startsWithOne = false;
  let hasPermittedCharsOnly = false;
  let hasCorrectParentheses = false;

  const tenDigitRegex = /\d{10}/;
  const elevenDigitRegex = /\d{11}/;
  const startWithOneRegex = /^(1){1}/;
  const permittedCharsRegex = /[0-9\-\(\) ]/;
  const correctParenthesesRegex = /^\([0-9]{3}\)$/;

  if (str.match(tenDigitRegex)) {
    hasTenDigits = true;
  }

  if (str.match(elevenDigitRegex)) {
    hasElevenDigits = true;
  }

  if (str.match(startWithOneRegex)) {
    startsWithOne = true;
  }


}

How do I check whether the last two Boolean values are true or not? Are my regular expressions for those alright? What about my regular expressions for the other three tests?

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