dcd55a434c
Exposes gohtml.registerComponents(slotsJSON) to browser context. Pure-Go buildComponentJS is testable without WASM; WASM glue uses Function constructor for browser-side execution. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
78 lines
2.1 KiB
Go
78 lines
2.1 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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html "forge.lthn.ai/core/go-html"
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)
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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 {
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return ""
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}
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variant := args[0].String()
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ctx := html.NewContext()
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if len(args) >= 2 {
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ctx.Locale = args[1].String()
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}
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layout := html.NewLayout(variant)
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if len(args) >= 3 && args[2].Type() == js.TypeObject {
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slots := args[2]
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for _, slot := range []string{"H", "L", "C", "R", "F"} {
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content := slots.Get(slot)
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if content.Type() == js.TypeString && content.String() != "" {
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switch slot {
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case "H":
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layout.H(html.Raw(content.String()))
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case "L":
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layout.L(html.Raw(content.String()))
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case "C":
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layout.C(html.Raw(content.String()))
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case "R":
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layout.R(html.Raw(content.String()))
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case "F":
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layout.F(html.Raw(content.String()))
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}
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}
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}
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}
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return layout.Render(ctx)
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}
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// registerComponentsJS wraps buildComponentJS for the WASM→JS bridge.
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// Takes a JSON string of slot assignments, generates the WC bundle,
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// and executes it in the browser via the Function constructor.
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func registerComponentsJS(_ js.Value, args []js.Value) any {
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if len(args) < 1 {
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return js.ValueOf("error: slotsJSON argument required")
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}
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jsCode, err := buildComponentJS(args[0].String())
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if err != nil {
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return js.ValueOf("error: " + err.Error())
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}
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// Execute the generated WC definitions in the browser context.
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// Uses the standard Function constructor — the normal Go WASM→JS pattern.
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fn := js.Global().Call("Function", jsCode)
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fn.Invoke()
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return js.ValueOf(jsCode)
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}
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func main() {
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js.Global().Set("gohtml", js.ValueOf(map[string]any{
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"renderToString": js.FuncOf(renderToString),
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"registerComponents": js.FuncOf(registerComponentsJS),
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}))
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select {}
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}
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