I am currently attempting to verify whether a given string contains only uppercase letters, numbers, and underscores by utilizing the pattern matching approach with /[A-Z0-9_]*/.
Despite this, executing the following code results in a return of true:
/[A-Z0-9_]*/.test("AJjdada")I am unsure if the regex pattern I have applied is accurate. Can someone confirm or correct it?
* signifies "zero or more". This means that anything will be a match as zero occurrences of [A-Z0-9_] is still valid. You can use the following code snippet:
/^[A-Z0-9_]+$/.test("AJjdada")
+ denotes "one or more". Additionally, ^...$ represents the start and end of the string. By including this, it ensures that all input must adhere to the regex pattern.
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