Remove the need for setting web_sys_unstable_apis (#5000)

* No longer required since https://github.com/emilk/egui/pull/4980

And despite some outdated comments, wgpu/WebGPU doesn't need it either

crates/eframe/src/lib.rs

@@ -10,9 +10,6 @@
 //! call [`crate::run_native`] from your `main.rs`, and/or use `eframe::WebRunner` from your `lib.rs`.
 //!
 //! ## Compiling for web
-//! To get copy-paste working on web, you need to compile with
-//! `export RUSTFLAGS=--cfg=web_sys_unstable_apis`.
-//!
 //! You need to install the `wasm32` target with `rustup target add wasm32-unknown-unknown`.
 //!
 //! Build the `.wasm` using `cargo build --target wasm32-unknown-unknown`

crates/eframe/src/web/app_runner.rs

@@ -276,14 +276,10 @@ impl AppRunner {
             super::open_url(&open.url, open.new_tab);
         }
 
-        #[cfg(web_sys_unstable_apis)]
         if !copied_text.is_empty() {
             super::set_clipboard_text(&copied_text);
         }
 
-        #[cfg(not(web_sys_unstable_apis))]
-        let _ = copied_text;
-
         if self.has_focus() {
             // The eframe app has focus.
             if ime.is_some() {

crates/eframe/src/web/events.rs

@@ -279,7 +279,6 @@ pub(crate) fn on_keyup(event: web_sys::KeyboardEvent, runner: &mut AppRunner) {
 }
 
 fn install_copy_cut_paste(runner_ref: &WebRunner, target: &EventTarget) -> Result<(), JsValue> {
-    #[cfg(web_sys_unstable_apis)]
     runner_ref.add_event_listener(target, "paste", |event: web_sys::ClipboardEvent, runner| {
         if let Some(data) = event.clipboard_data() {
             if let Ok(text) = data.get_data("text") {
@@ -294,7 +293,6 @@ fn install_copy_cut_paste(runner_ref: &WebRunner, target: &EventTarget) -> Resul
         }
     })?;
 
-    #[cfg(web_sys_unstable_apis)]
     runner_ref.add_event_listener(target, "cut", |event: web_sys::ClipboardEvent, runner| {
         if runner.input.raw.focused {
             runner.input.raw.events.push(egui::Event::Cut);
@@ -311,7 +309,6 @@ fn install_copy_cut_paste(runner_ref: &WebRunner, target: &EventTarget) -> Resul
         event.prevent_default();
     })?;
 
-    #[cfg(web_sys_unstable_apis)]
     runner_ref.add_event_listener(target, "copy", |event: web_sys::ClipboardEvent, runner| {
         if runner.input.raw.focused {
             runner.input.raw.events.push(egui::Event::Copy);

crates/eframe/src/web/mod.rs

@@ -168,7 +168,6 @@ fn set_cursor_icon(cursor: egui::CursorIcon) -> Option<()> {
 }
 
 /// Set the clipboard text.
-#[cfg(web_sys_unstable_apis)]
 fn set_clipboard_text(s: &str) {
     if let Some(window) = web_sys::window() {
         let promise = window.navigator().clipboard().write_text(s);

crates/eframe/src/web/web_runner.rs

@@ -35,11 +35,6 @@ impl WebRunner {
     /// Will install a panic handler that will catch and log any panics
     #[allow(clippy::new_without_default)]
     pub fn new() -> Self {
-        #[cfg(not(web_sys_unstable_apis))]
-        log::warn!(
-            "eframe compiled without RUSTFLAGS='--cfg=web_sys_unstable_apis'. Copying text won't work."
-        );
-
         let panic_handler = PanicHandler::install();
 
         Self {