I need to find a solution for checking a string that can be the pattern of RegExp Object like this.
str => new RegExp(str) can run and return a regex to use with test(), match(), ...
How can I check str available to use like the above way?
(I am trying to create a component like the website regex101.com so I want to know how they can check and show errors in regular expression input)
Thank you a lot.
Just use a try catch to test it:
function isValidRegex(str) {
try {
new RegExp(str);
return true;
} catch(ex) {
return false;
}
}