const regex = /^([0-9]{4}|[0-9]{2})[\/]([0]?[1-9]|[1][0-2])[\/]([0]?[1-9]|[1|2][0-9]|[3][0|1]), ([A|P])M([1-9]|1[0-2]):([0-5]\d) - (.*?): ([\s\S]*?END)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^([0-9]{4}|[0-9]{2})[\\\/]([0]?[1-9]|[1][0-2])[\\\/]([0]?[1-9]|[1|2][0-9]|[3][0|1]), ([A|P])M([1-9]|1[0-2]):([0-5]\\d) - (.*?): ([\\s\\S]*?END)$', 'gm')
const str = `2012/12/1, AM12:21 - user1: entry1END
2012/12/2, AM9:42 - user2: entry2END
2012/12/2, AM9:44 - user3: entry3_Line1_ContdWithFollowingLine
entry3_Line2_ContdWithABoveLine
entry3_Line3_ContdWithABoveLineEND
2012/12/4, AM11:48 - user7: entry4END`;
// 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