How to check for special characters in Javascript

Here’s an example of how to check for special characters in a JavaScript string using a regular expression pattern:

Explanation:

1. The function hasSpecialChar takes a string as input.
2. The regex variable is defined to hold a regular expression pattern: /[^a-zA-Z0-9]/g. The [^a-zA-Z0-9] pattern matches any character that is not a letter (upper- or lowercase) or a number. The g flag specifies a global search, which means that all occurrences in the string will be found, not just the first one.
3. The function returns the result of regex.test(string), which returns true if the pattern is found in the string, or false if it’s not.

You can then use the function to check a string for special characters:

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