Cross browser regular expression issue:

Recently I came across a regular expression that would cause the page to crash on iphone Safari browser, the regex was for obscuring email.

Problematic Regex:

const obscuredEmail = email.replace(/(?<=.1}).(?=[^@]*@)/g, '*');

Fix:

const obscuredEmail = email.replace(/(.)(?=.*@)/g, (match, p1, offset, string) => offset < string.indexOf('@') - 1 ? '*' : p1);

Lesson: Even a browser can cause browser compatibility issues.

#regex #browserCompatibility #safari #javascript