Regular Expressions 101

Explanation
Pro

1st Alternative(?<=(?:\s\"))[\s\S]+?(?=\")

Positive Lookbehind(?<=(?:\s\"))

Non-Capturing Group(?:\s\")

\sany whitespace character

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Character Class[\s\S]+?

+?matches at least one character from the set below:

\sany whitespace character

\Sany non-whitespace character

Positive Lookahead(?=\")

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative(?<=(?:\s))\d+

Positive Lookbehind(?<=(?:\s))

Non-Capturing Group(?:\s)

\sany whitespace character

\d+a digit, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

(?<=(?:\s\"))[\s\S]+?(?=\")|(?<=(?:\s))\d+

New

oneParticularFunction({
    key1: "string value",
    key2: 12345,
    key3: "strings which may contain ({ arbitrary characters })"
});

oneParticularFunction({
    key1: "string value",
    key2: 12345,
    key3: "strings which may contain ({ arbitrary characters })"
});