const regex = /^([1-9][1-9][1-9]\d{2}\d*|[1-9][2-9]\d{3}\d*|[2-9]\d{4}\d*|\d{6}\d*)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^([1-9][1-9][1-9]\\d{2}\\d*|[1-9][2-9]\\d{3}\\d*|[2-9]\\d{4}\\d*|\\d{6}\\d*)$', 'gm')
const str = `1
12
100
101
102
999
444
333
9999
10001
10000
10930
10903
11022
11014
11099
11100
12011
20000
30000
11111
11562
11234
12453
22222
232312
200000
2000000
123123213
12321324343432434`;
// 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