Question

How to extract a substring between two tags using RegEx in TypeScript

Answer 1

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

    // Use regex to match the pattern
    const match: RegExpExecArray | null = pattern.exec(str);

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

    // Return null if no match is found
    return null;
}

const str: string = "abcd <tag>efg hijk lmnop</tag> qrst uvwxyz";

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

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



   
/*
run:
    
"Extracted content: efg hijk lmnop" 

*/

 

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