Javascript 多个单词的正则表达式

Question

I am trying to make a regular expression that will account for the possible words "-hello,", "hello,", "-money,", "money," and it will replace these words if they exist, my current code is like

let regex = /(-?hello,-?money)/gi

but this doesnt work please help me find where this goes wrong, thank you

Answer 1

Use the | (Alternation) instead of the comma.

let regex = /(-?hello|-?money)/gi

Answer 2

You might also use an alternation only for the words and surround it with word boundaries \b to prevent partial matches.

let regex = /-?\b(?:hello|money)\b/gi

• -? Match an optional hyphen
• \b A word boundary
• (?: Non capture group
  • hello Match literally
  • | Or
  • money Match literally
• ) Close non capture group
• \b A word boundary

Regex demo

 let regex = /-?\b(?:hello|money)\b/gi; [ "-hello", "hello", "-money", "money", "test money nomoney", "test -hello hellow" ].forEach(s => console.log(s.replace(regex, "[replacement]")));