const regex = /(?="_id"\s*:)(?&key_value)
(?(DEFINE)
(?<string_inner>(?<=["])(?>[^"\\]++|[\\].)++(?=["]))
(?<string>["](?&string_inner)?+["])
(?<object>[{]\s*+(?&key_values)?+\s*+[}])
(?<array>\[\s*+(?&values)?+\s*+\])
(?<key_values>(?&key_value)(?>\s*+[,]\s*+(?&key_value))*+)
(?<key_value>(?&string)\s*+[:]\s*+(?&value))
(?<number>[-]?+\d++(?>[.]\d++)?+(?>[Ee][+-]?+\d++)?+)
(?<bool>true|false)
(?<scalar>(?&bool)|(?&number)|(?&string)|null)
(?<value>(?&scalar)|(?&object)|(?&array))
(?<values>(?&value)(?>\s*+[,]\s*+(?&value))*+)
)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?="_id"\\s*:)(?&key_value)
(?(DEFINE)
(?<string_inner>(?<=["])(?>[^"\\\\]++|[\\\\].)++(?=["]))
(?<string>["](?&string_inner)?+["])
(?<object>[{]\\s*+(?&key_values)?+\\s*+[}])
(?<array>\\[\\s*+(?&values)?+\\s*+\\])
(?<key_values>(?&key_value)(?>\\s*+[,]\\s*+(?&key_value))*+)
(?<key_value>(?&string)\\s*+[:]\\s*+(?&value))
(?<number>[-]?+\\d++(?>[.]\\d++)?+(?>[Ee][+-]?+\\d++)?+)
(?<bool>true|false)
(?<scalar>(?&bool)|(?&number)|(?&string)|null)
(?<value>(?&scalar)|(?&object)|(?&array))
(?<values>(?&value)(?>\\s*+[,]\\s*+(?&value))*+)
)', 'gm')
const str = `[
{
"_id": "56af331efbeca6240c61b2ca",
"index": 120000,
"guid": "bedb2018-c017-429E-b520-696ea3666692",
"isActive": false,
"balance": "\$2,202,350",
"object": {
"name": "alexander",
"lastname": "lang"
}
}
]
`;
// 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