40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
//go:build js && wasm
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package main
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import "syscall/js"
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func main() {
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document := js.Global().Get("document")
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element := func(id string) js.Value { return document.Call("getElementById", id) }
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source, width := element("source"), element("max-len")
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output, message := element("output"), element("message")
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render := func() {
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maxLen := width.Get("valueAsNumber").Int()
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element("width-value").Set("textContent", maxLen)
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tabLen := 4
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if maxLen < 80 {
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tabLen = 2
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}
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element("tab-value").Set("textContent", tabLen)
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source.Get("style").Set("tabSize", tabLen)
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output.Get("style").Set("tabSize", tabLen)
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formatted, err := formatSource(source.Get("value").String(), maxLen)
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if err != nil {
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output.Set("value", "")
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message.Set("textContent", err.Error())
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source.Call("setAttribute", "aria-invalid", "true")
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return
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}
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source.Call("removeAttribute", "aria-invalid")
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output.Set("value", string(formatted))
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message.Set("textContent", "")
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}
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listener := js.FuncOf(func(this js.Value, args []js.Value) any { render(); return nil })
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source.Call("addEventListener", "input", listener)
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width.Call("addEventListener", "input", listener)
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source.Set("disabled", false)
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width.Set("disabled", false)
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render()
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select {}
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}
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