elemental2 VS gwt3-processors

To work with browser APIs from Java we would use Elemental2, which is abstractions for JavaScript APIs, the set of Java wrappers based on the Closure Compiler externs.

First steps with Bazel are pain. What’s good, we can reuse 2 samples provided by the J2CL project, these 2 demos are more than enough to get us started. In short, the most important Bazel rules for us are j2cl_library and j2cl_application that can be used to set groups of files and transpile them into an executable JavaScript file. But for it to work one more step is required: we need to define an entry point for our application. It can be done in 2 ways: we can define it with a handwritten JavaScript script like it works in J2CL demos, or we can generate it with an annotation processor I wrote for this purpose, feel free to take a look at the demo too.