Validate Tutorialspoint URL via JavaScript regex?

To validate a TutorialsPoint URL using JavaScript, you can use regular expressions to check if the URL matches the expected domain pattern and extract specific parts of the URL.

Regular Expression Pattern

The regex pattern /^https?:\/\/(tutorialspoint\.com)\/(.*)$/ breaks down as follows:

• ^ - Start of string
• https? - Matches "http" or "https"
• :\/\/ - Matches "://"
• (tutorialspoint\.com) - Captures the domain (escaped dot)
• \/ - Matches forward slash
• (.*)$ - Captures everything after the domain until end of string

Example

function validateTutorialspointURL(myURL) {
    var regularExpression = /^https?:\/\/(tutorialspoint\.com)\/(.*)$/;
    return myURL.match(regularExpression) && myURL.match(regularExpression)[2];
}

console.log(validateTutorialspointURL("https://tutorialspoint.com/index"));
console.log(validateTutorialspointURL("https://tutorialspoint.com/java"));
console.log(validateTutorialspointURL("https://www.google.com/search"));
console.log(validateTutorialspointURL("http://tutorialspoint.com/javascript"));

index
java
false
javascript

Enhanced Validation Function

Here's an improved version that provides more detailed validation results:

function validateTutorialspointURL(url) {
    const regex = /^https?:\/\/(tutorialspoint\.com)\/(.*)$/;
    const match = url.match(regex);
    
    if (match) {
        return {
            isValid: true,
            domain: match[1],
            path: match[2] || 'root'
        };
    }
    return { isValid: false };
}

// Test various URLs
const testUrls = [
    "https://tutorialspoint.com/javascript/index.htm",
    "http://tutorialspoint.com/java",
    "https://www.tutorialspoint.com/python",
    "https://google.com/search"
];

testUrls.forEach(url => {
    const result = validateTutorialspointURL(url);
    console.log(`${url}: ${JSON.stringify(result)}`);
});

https://tutorialspoint.com/javascript/index.htm: {"isValid":true,"domain":"tutorialspoint.com","path":"javascript/index.htm"}
http://tutorialspoint.com/java: {"isValid":true,"domain":"tutorialspoint.com","path":"java"}
https://www.tutorialspoint.com/python: {"isValid":false}
https://google.com/search: {"isValid":false}

Key Points

• The function returns the path portion when URL is valid, or false when invalid
• Both HTTP and HTTPS protocols are supported
• The regex specifically matches "tutorialspoint.com" domain only
• URLs with "www." prefix will not match this pattern

Conclusion

Regular expressions provide an effective way to validate TutorialsPoint URLs and extract specific URL components. The validation ensures URLs match the expected domain pattern and can extract the path for further processing.