dont use stub.rs when wasmbind feature is enabled

no longer require wasmbind feature to get js-sys on wasm32-unknown-unknown target

CHANGELOG.md

@@ -35,6 +35,7 @@ Versions with only mechanical changes will be omitted from the following list.
 * Add the `and_local_timezone` method to `NaiveDateTime`
 * Fix the behavior of `Duration::abs()` for negative durations with non-zero nanos
 * Add compatibility with rfc2822 comments (#733)
+* Make `js-sys` and `wasm-bindgen` enabled by default when target is `wasm32-unknown-unknown` for ease of API discovery
 
 ## 0.4.19
 

Cargo.toml

@@ -26,7 +26,7 @@ libc = []
 std = []
 clock = ["std", "winapi"]
 oldtime = ["time"]
-wasmbind = ["wasm-bindgen", "js-sys"]
+wasmbind = [] # TODO: empty feature to avoid breaking change in 0.4.20, can be removed later
 unstable-locales = ["pure-rust-locales", "alloc"]
 __internal_bench = ["criterion"]
 __doctest = []
@@ -42,8 +42,8 @@ criterion = { version = "0.3", optional = true }
 rkyv = {version = "0.7", optional = true}
 
 [target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dependencies]
-wasm-bindgen = { version = "0.2", optional = true }
-js-sys = { version = "0.3", optional = true } # contains FFI bindings for the JS Date API
+wasm-bindgen = { version = "0.2" }
+js-sys = { version = "0.3" } # contains FFI bindings for the JS Date API
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.0", features = ["std", "minwinbase", "minwindef", "timezoneapi"], optional = true }

README.md

@@ -60,7 +60,6 @@ UNIX-like operating systems and the Windows API (`winapi`) for Windows.
 
 Optional features:
 
-- `wasmbind`: Enable integration with [wasm-bindgen][] and its `js-sys` project
 - [`serde`][]: Enable serialization/deserialization via serde.
 - `unstable-locales`: Enable localization. This adds various methods with a
   `_localized` suffix. The implementation and API may change or even be

src/datetime/mod.rs

@@ -994,21 +994,21 @@ impl<Tz: TimeZone> From<DateTime<Tz>> for SystemTime {
     }
 }
 
-#[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+#[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
 impl From<js_sys::Date> for DateTime<Utc> {
     fn from(date: js_sys::Date) -> DateTime<Utc> {
         DateTime::<Utc>::from(&date)
     }
 }
 
-#[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+#[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
 impl From<&js_sys::Date> for DateTime<Utc> {
     fn from(date: &js_sys::Date) -> DateTime<Utc> {
         Utc.timestamp_millis(date.get_time() as i64)
     }
 }
 
-#[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+#[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
 impl From<DateTime<Utc>> for js_sys::Date {
     /// Converts a `DateTime<Utc>` to a JS `Date`. The resulting value may be lossy,
     /// any values that have a millisecond timestamp value greater/less than ±8,640,000,000,000,000

src/lib.rs

@@ -47,7 +47,6 @@
 //!
 //! Optional features:
 //!
-//! - `wasmbind`: Enable integration with [wasm-bindgen][] and its `js-sys` project
 //! - [`serde`][]: Enable serialization/deserialization via serde.
 //! - `unstable-locales`: Enable localization. This adds various methods with a
 //!   `_localized` suffix. The implementation and API may change or even be

src/offset/local/mod.rs

@@ -11,7 +11,12 @@ use super::{LocalResult, TimeZone};
 use crate::naive::{NaiveDate, NaiveDateTime};
 use crate::{Date, DateTime};
 
-#[cfg(all(not(unix), not(windows)))]
+// we don't want `stub.rs` when using the wasmbind feature as we use js-sys to get the date instead
+#[cfg(all(
+    not(unix),
+    not(windows),
+    not(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))
+))]
 #[path = "stub.rs"]
 mod inner;
 
@@ -51,13 +56,16 @@ impl Local {
     }
 
     /// Returns a `DateTime` which corresponds to the current date and time.
-    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    #[cfg(not(all(
+        target_arch = "wasm32",
+        not(any(target_os = "emscripten", target_os = "wasi"))
+    )))]
     pub fn now() -> DateTime<Local> {
         inner::now()
     }
 
     /// Returns a `DateTime` which corresponds to the current date and time.
-    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    #[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
     pub fn now() -> DateTime<Local> {
         use super::Utc;
         let now: DateTime<Utc> = super::Utc::now();
@@ -101,7 +109,7 @@ impl TimeZone for Local {
         midnight.map(|datetime| Date::from_utc(*local, *datetime.offset()))
     }
 
-    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    #[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
     fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Local>> {
         let mut local = local.clone();
         // Get the offset from the js runtime
@@ -110,7 +118,10 @@ impl TimeZone for Local {
         LocalResult::Single(DateTime::from_utc(local, offset))
     }
 
-    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    #[cfg(not(all(
+        target_arch = "wasm32",
+        not(any(target_os = "emscripten", target_os = "wasi"))
+    )))]
     fn from_local_datetime(&self, local: &NaiveDateTime) -> LocalResult<DateTime<Local>> {
         inner::naive_to_local(local, true)
     }
@@ -120,14 +131,17 @@ impl TimeZone for Local {
         Date::from_utc(*utc, *midnight.offset())
     }
 
-    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    #[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
     fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Local> {
         // Get the offset from the js runtime
         let offset = FixedOffset::west((js_sys::Date::new_0().get_timezone_offset() as i32) * 60);
         DateTime::from_utc(*utc, offset)
     }
 
-    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    #[cfg(not(all(
+        target_arch = "wasm32",
+        not(any(target_os = "emscripten", target_os = "wasi"))
+    )))]
     fn from_utc_datetime(&self, utc: &NaiveDateTime) -> DateTime<Local> {
         // this is OK to unwrap as getting local time from a UTC
         // timestamp is never ambiguous

src/offset/local/stub.rs

@@ -18,7 +18,7 @@ pub(super) fn now() -> DateTime<Local> {
 }
 
 /// Converts a local `NaiveDateTime` to the `time::Timespec`.
-#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+#[cfg(not(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi")))))]
 pub(super) fn naive_to_local(d: &NaiveDateTime, local: bool) -> LocalResult<DateTime<Local>> {
     let tm = Tm {
         tm_sec: d.second() as i32,
@@ -54,7 +54,7 @@ pub(super) fn naive_to_local(d: &NaiveDateTime, local: bool) -> LocalResult<Date
 
 /// Converts a `time::Tm` struct into the timezone-aware `DateTime`.
 /// This assumes that `time` is working correctly, i.e. any error is fatal.
-#[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+#[cfg(not(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi")))))]
 fn tm_to_datetime(mut tm: Tm) -> DateTime<Local> {
     if tm.tm_sec >= 60 {
         tm.tm_nsec += (tm.tm_sec - 59) * 1_000_000_000;

src/offset/utc.rs

@@ -6,7 +6,7 @@
 use core::fmt;
 #[cfg(all(
     feature = "clock",
-    not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))
+    not(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))
 ))]
 use std::time::{SystemTime, UNIX_EPOCH};
 
@@ -47,7 +47,10 @@ impl Utc {
     }
 
     /// Returns a `DateTime` which corresponds to the current date and time.
-    #[cfg(not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind")))]
+    #[cfg(not(all(
+        target_arch = "wasm32",
+        not(any(target_os = "emscripten", target_os = "wasi"))
+    )))]
     pub fn now() -> DateTime<Utc> {
         let now =
             SystemTime::now().duration_since(UNIX_EPOCH).expect("system time before Unix epoch");
@@ -56,7 +59,7 @@ impl Utc {
     }
 
     /// Returns a `DateTime` which corresponds to the current date and time.
-    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
+    #[cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))]
     pub fn now() -> DateTime<Utc> {
         let now = js_sys::Date::new_0();
         DateTime::<Utc>::from(now)