Are the examples in the guide/docs supposed to run live

[greggman]

Describe the Bug

if I go to the docs/guide like say "Hello, world"

https://rustwasm.github.io/docs/wasm-bindgen/examples/hello-world.html

And click the run button ▶, I get

   Compiling playground v0.0.1 (/playground)
error[E0433]: failed to resolve: maybe a missing crate `wasm_bindgen`?
 --> src/main.rs:4:5
  |
4 | use wasm_bindgen::prelude::*;
  |     ^^^^^^^^^^^^ maybe a missing crate `wasm_bindgen`?
  |
  = help: consider adding `extern crate wasm_bindgen` to use the `wasm_bindgen` crate

error: cannot find attribute `wasm_bindgen` in this scope
  --> src/main.rs:11:3
   |
11 | #[wasm_bindgen]
   |   ^^^^^^^^^^^^

error: cannot find attribute `wasm_bindgen` in this scope
 --> src/main.rs:6:3
  |
6 | #[wasm_bindgen]
  |   ^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0433`.
error: could not compile `playground` (bin "playground") due to 3 previous errors

Are the supposed to run?

Steps to Reproduce

1. Go to https://rustwasm.github.io/docs/wasm-bindgen/examples/hello-world.html
2. Click on ▶
3. See error

If applicable, add a link to a test case (as a zip file or link to a repository we can clone).

Expected Behavior

Clicking ▶ should successfully run the example

Actual Behavior

Clicking ▶ prints errors about missing wasm_bindgen

Additional Context

I'm running Chrome v120 on M1 Mac.

[daxpedda]

This is quite unfortunate, I'm not sure how this worked in the past but the Rust playground doesn't include wasm-bindgen. Looking at their policy I don't think there is anything we can do here.

In any case, the documentation has to be adjusted to either remove the play button entirely or find an alternative.

[greggman]

I asked over on that repo about the policy.

https://github.com/rust-lang/rust-playground/issues/101#issuecomment-1875729447