Frame

Frame entry point, platform factories, and lifecycle hooks in the Nativeblocks DSL.

A frame is a single function that returns a NativeblocksFrame. The CLI locates it by the fixed name frame(). One frame function per file.

Entry point

fun frame(): NativeblocksFrame = androidFrame(name = "name", route = "/route") {
    // variables, lifecycle, rootBlock
}

The frame file extension is .kt (Kotlin), .tsx (TypeScript), or .swift (Swift). Never add an entry point (main, @main), the CLI injects its own runner at deploy time.

Platform factories

Platform	Kotlin	TypeScript	Swift
Android	`androidFrame(name, route) { }`	`androidFrame({ name, route })`	`androidFrame(name:route:) { f in }`
iOS	`iosFrame(name, route) { }`	`iosFrame({ name, route })`	`iosFrame(name:route:) { f in }`

name: PascalCase. For example: "ProductDetail", "CheckoutFlow"
route: kebab-case path. For example: "/product-detail", "/order/{orderId}"

The platform factory ties the frame to a platform, so its rootBlock and slots accept only that platform's blocks.

Lifecycle hooks

onAppear runs when the frame mounts; onDisappear runs when it unmounts. Both are optional and take actions.

androidFrame(name = "Home", route = "/home") {
    onAppear {
        script { _, updateVariable, _ -> updateVariable(loadingVar, "true") }
    }
    onDisappear {
        script { _, updateVariable, _ -> updateVariable(loadingVar, "false") }
    }
    rootBlock { /* ... */ }
}

Full example

profile-android.kt

package com.example.app.frames

import com.example.app.generated.shared.*
import com.example.app.generated.integration.android.Script.script
import com.example.app.generated.integration.android.nativeblocks.button.nativeblocksButton
import com.example.app.generated.integration.android.nativeblocks.column.NativeblocksColumn
import com.example.app.generated.integration.android.nativeblocks.column.nativeblocksColumn
import com.example.app.generated.integration.android.nativeblocks.image.NativeblocksImage
import com.example.app.generated.integration.android.nativeblocks.image.nativeblocksImage
import com.example.app.generated.integration.android.nativeblocks.spacer.nativeblocksSpacer
import com.example.app.generated.integration.android.nativeblocks.text.nativeblocksText

fun frame(): NativeblocksFrame = androidFrame(name = "Profile", route = "/profile") {
    val avatarUrl   by remember("https://example.com/avatar.jpg")
    val username    by remember("John Doe")
    val bio         by remember("Mobile engineer")
    val isFollowing by remember(false)
    val followLabel by remember("Follow")

    onAppear {
        script { _, updateVariable, _ ->
            updateVariable(followLabel, "Follow")
        }
    }

    rootBlock {
        nativeblocksColumn(
            blockKey = "main",
            width = NativeblocksColumn.WidthOptions.Match,
            height = NativeblocksColumn.HeightOptions.Match,
            horizontalAlignment = NativeblocksColumn.HorizontalAlignmentOptions.Center,
            content = {
                nativeblocksSpacer(blockKey = "topSpacer")
                nativeblocksImage(
                    blockKey = "avatar",
                    imageUrl = avatarUrl,
                    width = NativeblocksImage.WidthOptions.Wrap,
                    scaleType = NativeblocksImage.ScaleTypeOptions.Fit,
                )
                nativeblocksText(blockKey = "nameText", text = username, fontSize = "20")
                nativeblocksText(blockKey = "bioText", text = bio, fontSize = "14")
                nativeblocksSpacer(blockKey = "gap")
                nativeblocksButton(
                    blockKey = "followButton",
                    label = followLabel,
                    onClick = {
                        script { getVariable, _, _ ->
                            """
                            let f = ${getVariable(isFollowing)} !== "true";
                            updateVariable("${isFollowing.key}", String(f));
                            updateVariable("${followLabel.key}", f ? "Unfollow" : "Follow");
                            """.trimIndent()
                        }
                    },
                )
                nativeblocksSpacer(blockKey = "bottomSpacer")
            },
        )
    }
}

Deploy

# Development
nativeblocks frame deploy --file src/profile-android.kt --watch

# Production
nativeblocks frame deploy --file src/profile-android.kt --tag v1.0.0

--tag marks the deployed frame as a named release version; --tag and --watch are mutually exclusive.