Use feature flag instead

Author: expenses

Cargo.toml

@@ -13,13 +13,19 @@ Timeouts for futures.
 """
 
 [dependencies]
-
-[target.wasm32-unknown-unknown.dependencies]
-wasm-timer = "0.2.4"
-wasm-bindgen = "0.2.55"
-futures = "0.3.1"
-web-sys = "0.3.32"
+wasm-timer = { version = "0.2.4", optional = true }
+wasm-bindgen-crate = { package = "wasm-bindgen", version = "0.2.55", optional = true }
+futures = { version = "0.3.1", optional = true }
+web-sys = { version = "0.3.32", optional = true }
 
 [dev-dependencies]
 async-std = { version = "1.0.1", features = ["attributes"] }
 futures = "0.3.1"
+
+[features]
+wasm-bindgen = [
+	"wasm-timer",
+	"wasm-bindgen-crate",
+	"futures",
+	"web-sys"
+]

src/global_wasm.rs

@@ -6,7 +6,7 @@ use std::sync::Arc;
 use std::sync::Mutex;
 use std::task::Context;
 use std::time::Duration;
-use wasm_bindgen::{closure::Closure, JsCast};
+use wasm_bindgen_crate::{closure::Closure, JsCast};
 
 use crate::{Instant, Timer, TimerHandle};
 

src/lib.rs

@@ -19,9 +19,9 @@
 mod arc_list;
 mod atomic_waker;
 mod delay;
-#[cfg(not(all(target_arch = "wasm32", target_os = "unknown")))]
+#[cfg(not(feature = "wasm-bindgen"))]
 mod global_native;
-#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+#[cfg(feature = "wasm-bindgen")]
 mod global_wasm;
 mod heap;
 mod heap_timer;
@@ -34,7 +34,7 @@ use heap_timer::HeapTimer;
 use timer::{ScheduledTimer, Timer, TimerHandle};
 
 pub use self::delay::Delay;
-#[cfg(not(all(target_arch = "wasm32", target_os = "unknown")))]
+#[cfg(not(feature = "wasm-bindgen"))]
 use std::time::Instant;
-#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+#[cfg(feature = "wasm-bindgen")]
 use wasm_timer::Instant;

src/timer.rs

@@ -277,7 +277,7 @@ impl Default for TimerHandle {
         // handle which will return errors when timer objects are attempted to
         // be associated.
         if fallback == 0 {
-            #[cfg(not(all(target_arch = "wasm32", target_os = "unknown")))]
+            #[cfg(not(feature = "wasm-bindgen"))]
             {
                 let helper = match crate::global_native::HelperThread::new() {
                     Ok(helper) => helper,
@@ -298,7 +298,7 @@ impl Default for TimerHandle {
                 }
             }
 
-            #[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+            #[cfg(feature = "wasm-bindgen")]
             {
                 let handle = crate::global_wasm::run();