const regex = /^-?(?=\d{1,15}(?:[.,]0+)?0*$|(?:(?=.{1,16}0*$)(?:\d+[.,]\d+))).+$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^-?(?=\\d{1,15}(?:[.,]0+)?0*$|(?:(?=.{1,16}0*$)(?:\\d+[.,]\\d+))).+$', 'gm')
const str = `// PASS
0
0.00
1
-1
1.23456789012345
10.2345678901234
12.3456789012345
-123.4
-12.34
-1,33
-1.33
-123456789012345
-1234567890123450
-12345678901234.50
12345678901234.50
123456789012345.00
// FAIL
-1234567890123456
-12345678901234.56
12345678901234.56
123456789012345.60
1.234567890123456
12.34567890123456
123456789012340.6
123456789012300.67
123456789012300000000000.67
10000000000010000000001000010000000001.22`;
// 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