const regex = /^(?:(?![,0-9]{14})\d{1,3}(?:,\d{3})*(?:\.\d{1,2})?|(?![.0-9]{14})\d{1,3}(?:\.\d{3})*(?:\,\d{1,2})?)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?:(?![,0-9]{14})\\d{1,3}(?:,\\d{3})*(?:\\.\\d{1,2})?|(?![.0-9]{14})\\d{1,3}(?:\\.\\d{3})*(?:\\,\\d{1,2})?)$', 'gm')
const str = `123,456.00
123.456,00
123,456,789.00
123.456.789,00
123.456.789,0
123,456,781,123.00
123.456.789.123,00
234,567,890.89
1,234,567,890.89
1,234,567,890
1,234,567,890.89`;
// 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