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    <p>This is an issue of variable scoping.</p> <p>Think of "L" conceptually as a namespace. L exposes methods to you, such as map, L.map().</p> <p>Looks like you want to expose your "current_map" variable. In your map_global.js file, current_map is currently a local variable - because you declared it with <strong>var</strong>. So anything outside of the map_global.js scope, can NOT access current_map.</p> <p>If you want a quick and dirty way to access current_map in map_individual.js, you can expose it by setting the global window.current_map to L.map(map_id), so change the scope of your current_map variable.</p> <p>This of course leads to polluting the global scope, so one thing you can explore is how to achieve "modular" client side javascript. A simple way of doing this, is by implementing your own namespacing. E.g. in map_global.js, you can expose just one 'object' - your own namespace - and attach that to window. You can use your namespace to access current_map and setup_map(), if you attach those methods and vars to that 'object', instead of attaching all your methods and variables directly to the window - global namespace - which could get out of hand quickly.</p> <pre><code> function setup_map(){ ...} var current_map; window.my_lib = { setup_map = setup_map, current_map = current_map } </code></pre> <p>so <strong>my_lib.setup_map()</strong>, and <strong>my_lib.current_map</strong> could be accessed later in this way then, since you only make <strong>my_lib</strong> a global. Imagine if my_lib exposed a dozen functions, the idea is that this would be more organized, as opposed to attaching all dozen functions to the window - global namespace. This comes in handy later when you have different files/"modules" which have functions that are named the same. This way, you can have my_lib.render() and say, client_lib.render(), without overwriting one another, and maintain that separation, as a way of reducing the risk that you overwrite what is already in the global namespace.</p> <p>Note that the order in which you import scripts matters as well! There are also libraries such as RequireJS, CommonJS, just to name a few that try to deal with the dependency side of this whole modularity thing which can be worth exploring. So tread carefully and hope this helps!</p>
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    1. COExcellent. Works well. Thanks !
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      1. USThomas Clowes
 

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