Answers for "multiple regular expressions in one line"

regex find lines containing two strings

^(?=.*\bstring1\b)(?=.*\bstring2\b).*$

Regular Expressions: Match Single Character with Multiple Possibilities

let quoteSample = "Beware of bugs in the above code; I have only proved it correct, not tried it.";
let vowelRegex = /[aeiou]/gi; // Change this line
let result = quoteSample.match(vowelRegex); // Change this line