wasm-example sample code doesn't work about plotters

[38]

Hi there,

What IDE are you using? I am personally doesn't use any IDE. But it seems the IDE doesn't use WASM target to compile the code. Please note the CnavasBackend would be enabled only when the target is wasm32. (See examples/wasm-demo/start-server.sh for details)

Would you mind try to reproduce this with cargo build with a CLI output and share your Cargo.toml with me ?

Hope this is helpful :-)

[wmain]

Thanks for the quick reply!

Here's build output:

   Compiling nodrop v0.1.13
   Compiling scopeguard v1.0.0
   Compiling foreign-types-shared v0.1.1
   Compiling either v1.5.2
   Compiling adler32 v1.0.3
   Compiling color_quant v1.0.1
   Compiling lzw v0.10.0
   Compiling scoped_threadpool v0.1.9
   Compiling approx v0.1.1
   Compiling memory_units v0.4.0
   Compiling svg v0.5.12
   Compiling crossbeam-utils v0.6.6
   Compiling foreign-types v0.3.2
   Compiling arrayvec v0.4.11
   Compiling libc v0.2.62
   Compiling core-foundation-sys v0.6.2
   Compiling bitflags v1.1.0
   Compiling byteorder v1.3.2
   Compiling num-traits v0.2.8
   Compiling inflate v0.4.5
   Compiling memoffset v0.5.1
   Compiling wasm-bindgen v0.2.50
   Compiling gif v0.10.2
   Compiling crossbeam-queue v0.1.2
   Compiling crossbeam-epoch v0.7.2
   Compiling stb_truetype v0.3.0
   Compiling deflate v0.7.20
   Compiling num_cpus v1.10.1
   Compiling core-foundation v0.6.4
   Compiling time v0.1.42
   Compiling wee_alloc v0.4.5
   Compiling crossbeam-deque v0.7.1
   Compiling core-graphics v0.14.0
   Compiling rayon-core v1.6.0
   Compiling num-integer v0.1.41
   Compiling approx v0.3.2
   Compiling ordered-float v1.0.2
   Compiling tiff v0.2.2
   Compiling palette v0.4.1
   Compiling core-text v10.0.0
   Compiling rusttype v0.8.0
   Compiling font-loader v0.8.0
   Compiling rayon v1.2.0
   Compiling num-iter v0.1.39
   Compiling num-rational v0.2.2
   Compiling chrono v0.4.9
   Compiling png v0.14.1
   Compiling rusttype v0.7.9
   Compiling jpeg-decoder v0.1.16
   Compiling image v0.21.3
   Compiling plotters v0.2.5 (/Users/wmain/projects/plotters)
   Compiling wasm-demo v0.1.0 (/Users/wmain/projects/plotters/examples/wasm-demo)
error[E0433]: failed to resolve: use of undeclared type or module `CanvasBackend`
 --> src/func_plot.rs:8:19
  |
8 |     let backend = CanvasBackend::new(element).unwrap();
  |                   ^^^^^^^^^^^^^ use of undeclared type or module `CanvasBackend`

error[E0433]: failed to resolve: use of undeclared type or module `CanvasBackend`
  --> src/mandelbrot.rs:33:19
   |
33 |     let backend = CanvasBackend::new(element).unwrap();
   |                   ^^^^^^^^^^^^^ use of undeclared type or module `CanvasBackend`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0433`.
error: Could not compile `wasm-demo`.

Cargo.toml

[package]
name = "wasm-demo"
version = "0.1.0"
authors = ["Hao Hou <[email protected]>"]
edition = "2018"

[lib]
crate-type=['cdylib']

[dependencies]
plotters = {path = "../.."}
wasm-bindgen = "0.2.43"
wee_alloc = "*"

[profile.release]
lto = true

[wmain]

Adding the target totally fixes this I think! Thanks for the quick response :). This can be closed.

[38]

Awesome, closing the issue, feel free to reopen it if anything isn't right :)