javascript error --- page finishes loading before mapbox js, so throws error?

[cpsarason]

Totally not a priority at this stage, but for the record (and maybe sea-it-rise.com improves?) -- http://orca-sound-map.bitballoon.com/ opens fine on my Macbook in Firefox or Safari, but Chrome [Version 65.0.3325.181 (Official Build) (64-bit)] throws these errors in the Javascript console:

    at e._setupPainter (map.js:1426)
    at new e (map.js:268)
    at orcasound.html:147
Evented.fire @ evented.js:111
map.js:466 Uncaught TypeError: Cannot read property 'resize' of undefined
    at e.resize (map.js:466)
    at new e (map.js:297)
    at orcasound.html:147
map.js:466 Uncaught TypeError: Cannot read property 'resize' of undefined
    at e.resize (map.js:466)
    at e._onWindowResize (map.js:1605)```