To convert your JSON into an array and access the values by their keys in JavaScript, you can follow these steps:
Access the properties using their respective keys.
const jsonString = '[{"thumb_url":"tb-1370913834.jpg","event_id":"15","count":"44","event_tagline":"this is a tagline","event_name":"5th birthday","event_end":"1370919600","event_start":"1370876400"}]';
const events = JSON.parse(jsonString);
const event = events[0];
const thumb = event.thumb_url;
const name = event.event_name;
const tagline = event.event_tagline;