How can I add my javascript file

Hello

I have created a map with Leaflet here
https://smart-idea.io/measures/map_node1.php

I would like to add the map into a page.

I have to add into my skeleton this

<script src="js/map1.js"></script>
    </script>

The think, I also would like to do is to add something likw this

[leaflet-io mapid=node1 from="2017-10-29 10:00:00" to="2017-10-29 15:00:00"]

In resumé, this will call the following javascript fonction of map1.js
app.getTraces(mapid,from,to);

Could tell me how I can make this? How can I easyl create a extension, whill oad map1.js and when I add

[leaflet-io mapid=node1 from="2017-10-29 10:00:00" to="2017-10-29 15:00:00"]

into a page content, it will call app.getTrace with the 3 parameter?

Is it easy to do without a lot of knowledge?
Thanks

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