JavaScript: Matching strings using regular expressions

✨ Your Task

Return true only if string: 👉 contains only word characters: letters (a-z, A-Z), numbers (0-9), Underscore (_) AND 👉 is at least one character long.

✏️ JavaScript

👉 Press "Run" and check the result below.

Test cases

Should match string Hello

Should not match string Hello there

Should not match empty string

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JavaScript Fundamentals

A set of coding problems that cover the basic syntax and features of the programming language.

1. VariablesComplexity

Defining constants1 LoC

Declaring variables1 LoC

Defining arrays1 LoC

Type conversion3 LoC

2. FunctionsComplexity

Defining functions3 LoC

Default function argument values3 LoC

Variable-length argument lists5 LoC

3. OperatorsComplexity

Using logical operators3 LoC

4. Control structuresComplexity

Defining for loops6 LoC

5. Classes and ObjectsComplexity

Defining constructor methods5 LoC

Defining objects1 LoC

Creating class instances4 LoC

Defining static class properties3 LoC

Extending classes10 LoC

Matching strings using regular expressions3 LoC

6. StringsComplexity

Concatenating strings3 LoC

7. Regular expressionsComplexity

Matching strings using regular expressions3 LoC

8. Error handlingComplexity

Throwing errors6 LoC

9. MathComplexity

Calculating the area of a circle3 LoC