Question

How to extract a substring between two tags using RegEx in Node.js

Answer 1

function extractContentBetweenTags(str, tagName) {
    // Build a regex pattern using the specified tag name
    const pattern = new RegExp(`<${tagName}>(.*?)</${tagName}>`, 'g');

    // Use regex to match the pattern
    const match = pattern.exec(str);

    if (match) {
        // Return the content inside the tags
        return match[1];
    }

    // Return an empty string if no match is found
    return "";
}

const str = "abcd e<tag>fg hijk lmnop</tag> qrst uvwxyz";

// Call the function to extract the substring
const content = extractContentBetweenTags(str, "tag");

if (content) {
    console.log(`Extracted content: ${content}`);
} else {
    console.log("No matching tags found.");
}



/*
run:

Extracted content: fg hijk lmnop

*/

 

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