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How to check if a string has white space with JavaScript?

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To check if a string has white space with JavaScript, we can use the regex test method.

For instance, we write

const hasWhiteSpace = (s) => {
  return /\s/g.test(s);
};

to define the hasWhiteSpace function that checks if string s has any whitespaces with /\s/g.test.

We use \s to match any whitespaces in s.

The g flag makes test check for all instances of whitespaces.

Conclusion

To check if a string has white space with JavaScript, we can use the regex test method.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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