const regex = /([1-3]{1,2}-[A-Z][a-z]{2}-[0-9]{2}).([0-9]{5}).([A-Z][A-Za-z].{2,}).([0-9]{1,2}\.[0-9]{0,2})\n/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('([1-3]{1,2}-[A-Z][a-z]{2}-[0-9]{2}).([0-9]{5}).([A-Z][A-Za-z].{2,}).([0-9]{1,2}\\.[0-9]{0,2})\\n', 'g')
const str = ``;
const subst = `$1 $2 P540 $3 $4\n`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
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