const regex = /"value2":\s*\K[^\s,]*(?=\s*,)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('"value2":\\s*\\K[^\\s,]*(?=\\s*,)', 'gm')
const str = `{"value1":5.0,"value2":2.5,"value3":"2019-10-24T15:26:00.000Z","modifier":[]}
{"value1": 5.0,
"value2": 2.5,
"value3": "2019-10-24T15:26:00.000Z",
"modifier":[]}`;
// 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