const regex = /((((\b[1-9]\b|1[0-9]|2[0-8])[-]([1-9]|1[0-2]))|((29|30|31)[-]([13578]|1[02]))|((29|30)[-]([469]|11)))[-]([0-9][0-9][0-9][0-9]))|(29[-]2[-](([0-9][0-9])(00|04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96)))/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('((((\\b[1-9]\\b|1[0-9]|2[0-8])[-]([1-9]|1[0-2]))|((29|30|31)[-]([13578]|1[02]))|((29|30)[-]([469]|11)))[-]([0-9][0-9][0-9][0-9]))|(29[-]2[-](([0-9][0-9])(00|04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96)))', 'g')
const str = `29-2-2017
31-12-2017
1-2-2017
31-11-2017`;
// 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