Question

How to match the first word after an expression in a string using RegEx with JavaScript

Answer 1

function findNextWord(text, expression) {
    const pattern = new RegExp(expression.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&') + '\\s+(\\w+)', 'g');
    
    const match = pattern.exec(text);
    if (match) {
        console.log(`The first word after '${expression}' is: ${match[1]}`);
    } else {
        console.log('No match found!');
    }
}

const text = 'The quick brown fox jumps over the lazy dog.';
const expression = 'fox';

findNextWord(text, expression);

    
    
/*
run:
    
The first word after 'fox' is: jumps
    
*/

 

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Answer 2

const text = "The quick brown fox jumps over the lazy dog";
const expression = "fox"; // The expression to match before the word

// Regex to find the first word after the expression
const regex = new RegExp(`${expression}\\s+(\\w+)`); 

const match = text.match(regex);

if (match) {
  console.log("First word after " + expression + ":", match[1]);
} else {
  console.log(expression + "not found or no word after it.");
}


    
/*
run:
    
First word after fox: jumps
    
*/

 

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