const regex = /^(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?(\/.*)?$/mg;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(http:\\\/\\\/www\\.|https:\\\/\\\/www\\.|http:\\\/\\\/|https:\\\/\\\/)?[a-z0-9]+([\\-\\.]{1}[a-z0-9]+)*\\.[a-z]{2,5}(:[0-9]{1,5})?(\\\/.*)?$', 'mg')
const str = `// valid urls
https://www.google.com
http://www.google.com
http://google.com/
https://google.com/
www.google.com
google.com
https://www.google.com.ua
http://www.google.com.ua
http://google.com.ua
https://google.com.ua/
www.google.com.ua
google.com.ua
https://mail.google.com
http://mail.google.com
mail.google.com
// invalid urls
http://google
https://google.c
google
google.
.google
.google.com
goole.c
...`;
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