It would be most useful if a Typescript definition file would be maintained for jimu.js (jimu.d.ts) in a similar fashion to the arcgis-js-api. Web AppBuilder Custom Widgets Web Developers Web AppBuilder for ArcGIS
There is a file named "jimu.d.ts" in the "jimu.js" folder of an app made with webappbuilder. It is hard to tell if it is an up to date version or not. Or even if it is a complete definition file.
Having something like the arcgis-js-api would be very useful.
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