Please tell me my mistake am not able to find

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**

function telephoneCheck(str) {
let regExp = /^(1\s?)?(\d{3}|\(d{3}\))[\-\s]?\d{3}[\-\s]?\d{4}$/;
  return regExp.test(str);


  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Challenge: Telephone Number Validator

Link to the challenge:

It looks like you are missing a backslash before your second d. Your regex is looking for three of the letter d, instead of three numbers. I fixed that and the test passed for me.

got it , thank you so much

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