const regex = /(?:line(\d+)\R)?(\d{2}(?::\d{2}){2}\.\d{2,3})\s*-->\s*(\d{2}(?::\d{2}){2}\.\d{2,3})\R((?:[^\r\n]|\r?\n[^\r\n])*)(?:\r?\n\r?\n|$)/gi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:line(\\d+)\\R)?(\\d{2}(?::\\d{2}){2}\\.\\d{2,3})\\s*-->\\s*(\\d{2}(?::\\d{2}){2}\\.\\d{2,3})\\R((?:[^\\r\\n]|\\r?\\n[^\\r\\n])*)(?:\\r?\\n\\r?\\n|$)', 'gi')
const str = `WEBVTT FILE
line1
00:00:00.000 --> 00:00:10.000
‘Stuff’
line2
00:00:10.000 --> 00:00:20.000
Other stuff
Example with 2 lines
line3
00:00:20.00 --> 00:00:30.000
Example with only 2 digits in milliseconds
line4
00:00:30.000 --> 00:00:40.000
Different stuff
00:00:40.000 --> 00:00:50.000
Example without a head line`;
// 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