const regex = /(?:Mr|Mrs|Miss|Dr)\.\s*|\.\s*(\w+)/gmi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:Mr|Mrs|Miss|Dr)\\.\\s*|\\.\\s*(\\w+)', 'gmi')
const str = `There are a lot of questions about lookbehind, But I couldn't find my answer.
My RegExp with negative lookbehind is working fine in chrome but not in IE.
I need a regular expression that match any word after a period(.) but there should not be a (Mr) before the period. for example in
'I met Mr. Jack this evening. He is a good man', but honestly Miss. Jackson, I am for real.
I want to get He, but not Jack (since it is followed by Mr.)
so far I have comeup with the mrs. Sullivan regExp which works fine on chrome, But it doesn't on IE. and It is to be run on IE.`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions