[Vuejs]-Error: Module build failed (from ./node_modules/babel-loader/lib/index.js): SyntaxError:

Try this in Created this.initMap() = function() { … }

Your code will not work because you are trying to access a variable that is not initialized yet. In Vue First created method is executed then mounted method.

More info here: https://v2.vuejs.org/v2/guide/instance.html#Instance-Lifecycle-Hooks