const regex = /^https?:\/\/www\.example\.com(?:\/[a-zA-Z]+)*(?:\/\d+\.html)?$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^https?:\\\/\\\/www\\.example\\.com(?:\\\/[a-zA-Z]+)*(?:\\\/\\d+\\.html)?$', 'gm')
const str = `https://www.example.com
https://www.example.com/demo
https://www.example.com/demo/abc
https://www.example.com/demo/abc/123.html
不匹配:
https://www.example.com/demo/abc/efg123.html
（可能含有数字）`;
// 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