Проверка проверки шаблона режима на HTML
const regex = /^(?![0,.]*$|0\d*$)\d{1,3}(?:,\d{3})*(?:\.\d{1,2})?$/;
[
"0",
"012",
"0.00",
"0.0",
"0.",
"00122",
"0.12",
"0.01",
"1,234.00",
"1.00",
"123,456",
"1.23"
].forEach(s => console.log(`${s} --> ${regex.test(s)}`));
SAMER SAEID