Web timer support

.github/workflows/ci.yml

@@ -38,6 +38,7 @@ jobs:
       - name: Install Rust
         # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
         run: rustup update ${{ matrix.rust }} --no-self-update && rustup default ${{ matrix.rust }}
+      - run: rustup target add wasm32-unknown-unknown
       - run: cargo build --all --all-features --all-targets
       - name: Run cargo check (without dev-dependencies to catch missing feature flags)
         if: startsWith(matrix.rust, 'nightly')
@@ -50,6 +51,9 @@ jobs:
 #        if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
 #        run: cargo check -Z build-std --target=riscv32imc-esp-espidf
       - run: cargo test
+      - uses: taiki-e/install-action@wasm-pack
+      - run: cargo check --target wasm32-unknown-unknown --all-features --tests
+      - run: wasm-pack test --firefox --headless
 
   # Copied from: https://github.com/rust-lang/stacker/pull/19/files
   windows_gnu:

Cargo.toml

@@ -23,11 +23,13 @@ name = "timer"
 harness = false
 
 [dependencies]
-async-lock = "2.6"
 cfg-if = "1"
+futures-lite = { version = "1.11.0", default-features = false }
+
+[target.'cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))'.dependencies]
+async-lock = "2.6"
 concurrent-queue = "2.2.0"
 futures-io = { version = "0.3.28", default-features = false, features = ["std"] }
-futures-lite = { version = "1.11.0", default-features = false }
 parking = "2.0.0"
 polling = "3.0.0"
 rustix = { version = "0.38.2", default-features = false, features = ["std", "fs"] }
@@ -36,15 +38,28 @@ socket2 = { version = "0.5.3", features = ["all"] }
 tracing = { version = "0.1.37", default-features = false }
 waker-fn = "1.1.0"
 
+[target.'cfg(all(target_family = "wasm", not(target_os = "wasi")))'.dependencies]
+atomic-waker = "1.1.1"
+wasm-bindgen = "0.2.87"
+web-sys = { version = "0.3.0", features = ["Window"] }
+
 [dev-dependencies]
 async-channel = "1"
+
+[target.'cfg(not(all(target_family = "wasm", not(target_os = "wasi"))))'.dev-dependencies]
 async-net = "1"
 blocking = "1"
 criterion = { version = "0.4", default-features = false, features = ["cargo_bench_support"] }
 getrandom = "0.2.7"
 signal-hook = "0.3"
 tempfile = "3"
 
+[target.'cfg(all(target_family = "wasm", not(target_os = "wasi")))'.dev-dependencies]
+console_error_panic_hook = "0.1.7"
+wasm-bindgen-futures = "0.4.37"
+wasm-bindgen-test = "0.3.37"
+web-time = "0.2.0"
+
 [target.'cfg(target_os = "linux")'.dev-dependencies]
 inotify = { version = "0.10.1", default-features = false }
 timerfd = "1"