Whitespace Checking in JavaScript | Regular Expressions

Introduction

In this lab, we will explore how to check if a given string contains any whitespace characters using regular expressions in JavaScript. The lab will provide a step-by-step guide on how to use the RegExp.prototype.test() method to check if a string contains any whitespace characters. By the end of this lab, you will have a better understanding of how to check for whitespace characters in JavaScript strings.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL javascript(("JavaScript")) -.-> javascript/BasicConceptsGroup(["Basic Concepts"]) javascript/BasicConceptsGroup -.-> javascript/variables("Variables") javascript/BasicConceptsGroup -.-> javascript/data_types("Data Types") javascript/BasicConceptsGroup -.-> javascript/arith_ops("Arithmetic Operators") javascript/BasicConceptsGroup -.-> javascript/comp_ops("Comparison Operators") subgraph Lab Skills javascript/variables -.-> lab-28211{{"Check if String Contains Whitespace"}} javascript/data_types -.-> lab-28211{{"Check if String Contains Whitespace"}} javascript/arith_ops -.-> lab-28211{{"Check if String Contains Whitespace"}} javascript/comp_ops -.-> lab-28211{{"Check if String Contains Whitespace"}} end

Checking for Whitespace in a String

To check if a string contains whitespace characters, follow the steps below:

Open the Terminal/SSH and type node to start practicing coding.
Use RegExp.prototype.test() with an appropriate regular expression to check if the given string contains any whitespace characters.

Here's an example code snippet:

const containsWhitespace = (str) => /\s/.test(str);

To test the function, call containsWhitespace with a string as an argument. It will return true if the string contains whitespace characters, otherwise false.
```
containsWhitespace("lorem"); // false
containsWhitespace("lorem ipsum"); // true
```

Summary

Congratulations! You have completed the Check if String Contains Whitespace lab. You can practice more labs in LabEx to improve your skills.