JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<body>
<p id="txt1"></p>
<p id="txt2"></p>
<p id="txt3"></p>
<p id="txt4"></p>
</body>

JavaScript

function My_constructor() {
  this.my_array = [0, 0, 0];
}


let my_objects = [];
for (i = 0; i < 10; i++) { my_objects.push(new My_constructor()); }



// Print object 0 and 1 from array
document.getElementById("txt1").innerHTML = my_objects[0].my_array;
document.getElementById("txt2").innerHTML = my_objects[1].my_array;

// Change parameter in one of the objects from the array
my_objects[0].my_array[0] = 1;

document.getElementById("txt3").innerHTML = my_objects[0].my_array;
document.getElementById("txt4").innerHTML = my_objects[1].my_array;