const regex = /^(0*[1-9]\d{0,9}(\.\d{0,2})?0*|0*\.([1-9]|\d[1-9]|[1-9]\d)0*)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(0*[1-9]\\d{0,9}(\\.\\d{0,2})?0*|0*\\.([1-9]|\\d[1-9]|[1-9]\\d)0*)$', 'gm')
const str = `0
.0
.00
0.0
.
00016515464645
-1
-1.2
1..1
1.1.1
..1
..1.1
-
.-
-.16
111111111111111111
1.11111111
1.584646
00000.13
00000000014.15
1
1.2
0.2
.1
20
20.0
20.00
20.
1641616515
0001641616515
0165154646
20.00000000
0.1100000000000
1234567890.11`;
// 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