.min is the minified version, and it is primarily used while the website is being launched in order to reduce the load for the particular website.

Basically all the long variable names and function names are converted into shorter ones during the process of minifying. As consequence it would reduce the size of that particular file, so it would less the loading speed of the website.

On the other hand normal .js is the one which is used until the site being launched, meaning while the site in the mode of development/testing.

AngularJS minifies your source files. This creates a min.js-file for every conventional js file.

minifying is the process of removing any unneccesary information from your source code (like spaces, line breaks,...). It also shortens variable names and so on. This is done so that the resulting, minified script file consumes as few space as possible, which allows the web page to load faster (less network traffic).

Minifying should be done automatically, and there is no need to make your code changes multiple times. never. If that "automatic process" is not working for you, you should post a different question (something like AngularJS minification not working)

How about augmenting the built-in Array object to use Math.max/Math.min instead:

Array.prototype.max = function() {
  return Math.max.apply(null, this);
};

Array.prototype.min = function() {
  return Math.min.apply(null, this);
};

let p = [35,2,65,7,8,9,12,121,33,99];

console.log(`Max value is: ${p.max()}` +
  `\nMin value is: ${p.min()}`);

Here is a JSFiddle.

Augmenting the built-ins can cause collisions with other libraries (some see), so you may be more comfortable with just apply'ing Math.xxx() to your array directly:

var min = Math.min.apply(null, arr),
    max = Math.max.apply(null, arr);

Alternately, assuming your browser supports ECMAScript 6, you can use spread syntax which functions similarly to the apply method:

var min = Math.min( ...arr ),
    max = Math.max( ...arr );