Topic describes
Their thinking
- In this case, I use the regular method, by considering multiple cases, because all the test cases have been given, as long as all cases can be considered, through the regular expression can pass the test.
- This question may not be the best solution. If readers have other better solutions, please leave comments.
The problem solving code
function telephoneCheck(str) {
let reg = /^1\s? \(\d{3}\).? \d{3}.? \d{4}|^1\s\d{3}[\(|-]\d{3}[-]\d{4}|^\d{10}$|\d{3}\s\d{3}\s\d{4}|^\(\d{3}\)\d{3}-\d{4}|^\d{3}-\d{3}-\d{4}$/
const bol = reg.test(str);
return bol
}
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The title to reflect
Mastering regular expressions will greatly improve your development efficiency.