Distribution files pollute global namespace

[kwiskia]

The distribution files arrow.js and parser.js create a lot of variables on the global namespace, or window when loaded when loaded via web browser.

Replication

• Load a web application with arrows.
• Open browser development console.
• Variables that should be private are in the window namespace. E.g., _cancelerId, numannotations, etc.

Possible fix
Wrap distribution source in an IIFE, and manually attach public functions/variables to the window namespace.

(function() {
    "use strict";

    // ... code for arrows goes here ...

    window.Arrows = Arrows;
})();

Alternatively, the issue could be resolved by using AMD and CommonJS style definitions.