const regex = /^(?=.*word1\s+(?:\S+\s+){0,3}word2.*$).*/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?=.*word1\\s+(?:\\S+\\s+){0,3}word2.*$).*', 'gm')
const str = `text text word1 text text word2 text text
text text word1 text text text word2 text text
text text word1 text text text text word2 text text
text text word1 word2 text text
text text word1 text text word2 text text
text text word1 text text word5 text text
`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions