How to write this RegExp /^\sFirstName\s$/ using a variable? I want to replace FirstName with a variable?

Question

I am trying to write the RegExp that begins with either the space or the word, but I want to pass the word using the variable. Does anyone have idea about this?

Did you try [How do you use a variable in a regular expression?](https://stackoverflow.com/questions/494035/how-do-you-use-a-variable-in-a-regular-expression?rq=1)? — ggorlen, Dec 13 '22 at 04:52

Saddle Point · Answer 1 · 2022-12-13T05:34:50.757

1

Regex express is just a normal string, you can replace the variable with string method and then use it as pattern. For example:

const getPattern = function (placeholder) {
  return new RegExp(`\\s*${placeholder}\\s*$`);
}
const matcher = getPattern('firstName');
console.log(matcher.exec('my firstName '));

edited Dec 13 '22 at 05:34

answered Dec 13 '22 at 04:56

Saddle Point

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2

OP question tagged `js` not `py` – wei Dec 13 '22 at 05:16
1

@wei thx, the example has been modified. – Saddle Point Dec 13 '22 at 05:36

How to write this RegExp /^\s*FirstName\s*$/ using a variable? I want to replace FirstName with a variable?

1 Answers1

How to write this RegExp /^\sFirstName\s$/ using a variable? I want to replace FirstName with a variable?