JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" value="Click Me" onclick="getSelected_click(this)" />

JavaScript

function getSelected_click(button) {
    var tab =  [ 
        { id: '1', 'count(user)': 11 },
        { id: '2', 'count(user)': 31 },
        { id: '3', 'count(user)': 3 } 
    ];
    alert(tab[1]["count(user)"]);
}