Florian,
By putting window.path + 'libs/canvasjs/canvasjs.js' into the resources array in init.js file, the WAB should load the canvasjs.js file from the libs/canvasjs folder relative to the init.js file.
So, the init.js file configuration should be fine.
I am not sure with the custom widget sample code snippet you send.
What does the [...] and 'CanvasJS' in define mean?
Your custom widget doesn't need to load CanvasJS dependency, because the CanvasJS should be already available at global scope.
Your custom widget:
define([
'dojo/_base/declare',
'jimu/BaseWidget'
], function (declare, BaseWidget) {
return declare([BaseWidget], {
startup: function() {
console.log('CanvasJS=', CanvasJS);
}
});
});
