Various targets have their template type-checking disabled in the past. There is no reason for this any more. The only target that was tricky was packages/examples/core:core_examples which was quite broken and I had to fix it up. Template typechecking is still disabled under blaze, see FW-1753 for more info. PR Close #34144
How to serve the examples
All playground examples are built and served with Bazel. Below is an example that demonstrates how a specific example can be built and served with Bazel:
# e.g. src/zippy_component
yarn bazel run modules/playground/src/zippy_component:devserver
# e.g. src/upgrade
yarn bazel run modules/playground/src/upgrade:devserver