JavaScript code - UNIX grep command?

Hi

I am new to JavaScript & haven't done much work with it, but have mainly experience with UNIX. I have a piece of code where I want to grep (excuse the UNIX language ) for a id and get the number from that.

{
"time": 900,
"avail": 1,
"price": 0,
"datetime": "2019-11-09T15:00:00+00:00"
}
{
"name": "janice-bishop",
"date": "2019-11-09",
"event_ID": 155643,
"person_ID": 18709,...

JavaScript code - UNIX grep command?

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