oxedyne/fe2o3 — fe2o3_core/src/wasm.rs

863 bytes, 1 run

created by r1870400018:13113, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	//! Runtime shims for the `wasm32` target.
2	//!
3	//! A browser has no OS monotonic clock, no spawnable threads and no console
4	//! other than the JavaScript one. Calls such as `Instant::now`,
5	//! `SystemTime::now` and `thread::spawn` compile for `wasm32-unknown-unknown`
6	//! but panic at runtime. These helpers give `fe2o3_core`'s clock and logger a
7	//! panic-free path in the browser whilst the native code is left untouched.
8
9	use wasm_bindgen::JsValue;
10
11	/// Returns the current wall-clock time in milliseconds since the Unix epoch,
12	/// using the JavaScript `Date.now()` primitive. It never panics and is
13	/// available on both the main thread and web workers.
14	pub fn now_ms() -> f64 {
15	js_sys::Date::now()
16	}
17
18	/// Emits a single line to the browser console via `console.log`.
19	pub fn console_log(s: &str) {
20	web_sys::console::log_1(&JsValue::from_str(s));
21	}