const regex = /^(000[1-9]|00[1-9]\d|0[1-9]\d\d|100\d|10[1-9]\d|1[1-9]\d{2}|[2-9]\d{3}|[1-9]\d{4}|1\d{5}|2[0-6]\d{4}|27[0-4]\d{3}|275[0-6]\d{2}|2757[0-5]\d|275760)-W(([1-4]\d)|(5[0-3])|0[1-9])$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(000[1-9]|00[1-9]\\d|0[1-9]\\d\\d|100\\d|10[1-9]\\d|1[1-9]\\d{2}|[2-9]\\d{3}|[1-9]\\d{4}|1\\d{5}|2[0-6]\\d{4}|27[0-4]\\d{3}|275[0-6]\\d{2}|2757[0-5]\\d|275760)-W(([1-4]\\d)|(5[0-3])|0[1-9])$', 'gm')
const str = `min possible year :
0001-W10
max possible year :
275760-W05
min possible week :
1969-W01
max possible week :
1969-W53
`;
const subst = `$1-W$2`;
// 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