a02843a5ad
Preserve empty string slot values in renderToString so explicit empty slots still render as empty containers.\n\nCo-Authored-By: Virgil <virgil@lethean.io>
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
//go:build js && wasm
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package main
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import (
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"syscall/js"
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)
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// Keep the callback alive for the lifetime of the WASM module.
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var renderToStringFunc js.Func
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// renderToString builds an HLCRF layout from JS arguments and returns HTML.
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// Slot content is injected via Raw() — the caller is responsible for sanitisation.
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// This is intentional: the WASM module is a rendering engine for trusted content
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// produced server-side or by the application's own templates.
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func renderToString(_ js.Value, args []js.Value) any {
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if len(args) < 1 || args[0].Type() != js.TypeString {
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return ""
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}
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variant := args[0].String()
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if variant == "" {
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return ""
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}
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locale := ""
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if len(args) >= 2 && args[1].Type() == js.TypeString {
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locale = args[1].String()
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}
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slots := make(map[string]string)
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if len(args) >= 3 && args[2].Type() == js.TypeObject {
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jsSlots := args[2]
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for _, slot := range []string{"H", "L", "C", "R", "F"} {
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content := jsSlots.Get(slot)
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if content.Type() == js.TypeString {
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slots[slot] = content.String()
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}
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}
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}
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return renderLayout(variant, locale, slots)
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}
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func main() {
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renderToStringFunc = js.FuncOf(renderToString)
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api := js.Global().Get("Object").New()
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api.Set("renderToString", renderToStringFunc)
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js.Global().Set("gohtml", api)
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select {}
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}
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