const regex = /^(https?:\/\/)?((25[0-5]|2[0-4][\d]|[1][\d][\d]|[1-9][\d]|[\d])(\.|:)?){4}([\d]{2,4})?((\/[\w]+)+)?/gmi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(https?:\\\/\\\/)?((25[0-5]|2[0-4][\\d]|[1][\\d][\\d]|[1-9][\\d]|[\\d])(\\.|:)?){4}([\\d]{2,4})?((\\\/[\\w]+)+)?', 'gmi')
const str = `http://192.168.0.1
https://192.168.0.1
255.255.255.255
http://192.168.0.1:8080
http://10.3.4.27.
http://10.3.4.27:
http://10.3.4.27:8080
http://10.3.4.27:80
http://1.3.4.27:8080/login
http://10.3.4.27:8080/login/v2/flow/ZWxIGdDQ9WcYHsz7QykGlbiXhbwU0Fpiq4En3nnzeIWyOioS50l9gLgt4CZL0B1IRMGIYhssl1VUMLXsy2uTUKmsAe7VhySHN67BSLROqV4sdK8ilvvR3SSU3tt05PwM) `;
// 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