Provides a well-constructed main loop useful for JavaScript games and other animated or time-dependent applications.

The main loop is a core part of any application in which state changes over time. In games, it is typically responsible for computing physics and AI as well as drawing the result on the screen.

This script is based on MainLoop.js, , with any improves.

you can find tool for this library in https://github.com/erovas/MainLoopX_tools

Import the MainLoopX.js JavaScript library wherever you want into the document before using it.

<script src="MainLoopX.js"></script>
<script>
    MainLoopX.update = function(timeStep){
      //Do logic
    }
  
    MLX.start();
</script>

or

<script defer src="MainLoopX.js"></script>
<script defer src="otherScript.js"></script>

or

<script type="module" src="MainLoopX.js"></script>
<script type="module" src="otherScript.js"></script>

or

<script type="module">
    import "MainLoopX.js";
     MainLoopX.update = function(timeStep){
      //Do logic
    }
  
    MLX.start();
</script>

MainLoopX works by running functions you define every time the browser is ready to update the screen (up to about 60 times per second on most monitors). There are four such functions, all of which are optional. You can set them using the following methods:

• MainLoopX.begin: the begin function runs at the beginning of each frame and is typically used to process input.
• MainLoopX.update: the update function runs zero or more times per frame depending on the frame rate. It is used to compute anything affected by time - typically physics and AI movements.
• MainLoopX.draw: the draw function should update the screen, usually by changing the DOM or painting a canvas.
• MainLoopX.end: the end function runs at the end of each frame and is typically used for cleanup tasks such as adjusting the visual quality based on the frame rate.

The update function receives a timestep parameter which holds the amount of time in milliseconds that should be simulated. This should be used to calculate movement. For example, if an object obj has an x-axis velocity of 100 units per second (0.1 units per millisecond), the update function might look like this:

function update(timestep) {
    obj.x += 0.1 * timestep;
}

This structure will ensure that your application behaves regardless of the frame rate.

To start the application, simply call MainLoopX.start(). For example, to start the application for the first time, you might write:

MainLoopX.update = update
MLX.draw = draw
MLX.start();

You can call MainLoopX.stop()/MLX.stop() to stop the application.

https://erovas.github.io/MainLoopX.js/

This project is MIT-licensed.

Compatible with all modern browsers (IE9+) including mobile browsers, as well as node.js. There are no dependencies.