61 lines
1.7 KiB
Markdown
61 lines
1.7 KiB
Markdown
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# WASM for _Tcell_
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You can build _Tcell_ project into a webpage by compiling it slightly differently. This will result in a _Tcell_ project you can embed into another html page, or use as a standalone page.
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## Building your project
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WASM needs special build flags in order to work. You can build it by executing
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```sh
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GOOS=js GOARCH=wasm go build -o yourfile.wasm
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```
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## Additional files
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You also need 5 other files in the same directory as the wasm. Four (`tcell.html`, `tcell.js`, `termstyle.css`, and `beep.wav`) are provided in the `webfiles` directory. The last one, `wasm_exec.js`, can be copied from GOROOT into the current directory by executing
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```sh
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cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" ./
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```
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In `tcell.js`, you also need to change the constant
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```js
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const wasmFilePath = "yourfile.wasm"
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```
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to the file you outputed to when building.
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## Displaying your project
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### Standalone
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You can see the project (with an white background around the terminal) by serving the directory. You can do this using any framework, including another golang project:
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```golang
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// server.go
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package main
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import (
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"log"
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"net/http"
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)
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func main() {
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log.Fatal(http.ListenAndServe(":8080",
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http.FileServer(http.Dir("/path/to/dir/to/serve")),
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))
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}
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```
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To see the webpage with this example, you can type in `localhost:8080/tcell.html` into your browser while `server.go` is running.
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### Embedding
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It is recomended to use an iframe if you want to embed the app into a webpage:
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```html
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<iframe src="tcell.html" title="Tcell app"></iframe>
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```
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## Other considerations
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### Accessing files
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`io.Open(filename)` and other related functions for reading file systems do not work; use `http.Get(filename)` instead.
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