Replacing a word with another word without replacing another word which contains a similar substring in the same sentence in Javascript

Question

I'm trying to replace a word with another word, specifically "has" with "had". But the string contains the word "hash" which has the substring "has" so it also gets replaced. What can I do to fix this?

function replace() {
    sentence = sentence.replaceAll("has", "had");
}

Answer 1

Place word boundaries around the word to be replaced:

var input = "A man who has an appetite ate hashed browns";
var output = input.replace(/\bhas\b/g, "had");
console.log(output);

Note that I used regular replace along with the /g global flag. This should have the same behavior as using replaceAll.