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6.7.0/html/Index.svelte

@@ -11,8 +11,10 @@
 	import { Code as CodeIcon } from "@gradio/icons";
 	import { css_units } from "@gradio/utils";
 	import type { HTMLProps, HTMLEvents } from "./types.ts";
+	import type { Snippet } from "svelte";
 
 	let props = $props();
+	let children: Snippet | undefined = props.children;
 	const gradio = new Gradio<HTMLEvents, HTMLProps>(props);
 
 	let _props = $derived({
@@ -99,7 +101,9 @@
 					gradio.shared.visible = e.detail.data;
 				}
 			}}
-		/>
+		>
+			{@render children?.()}
+		</HTML>
 	</div>
 </Block>
 

6.7.0/html/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@gradio/html",
-	"version": "0.9.3",
+	"version": "0.10.0",
 	"description": "Gradio UI packages",
 	"type": "module",
 	"author": "",

6.7.0/html/shared/HTML.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { createEventDispatcher, tick } from "svelte";
 	import Handlebars from "handlebars";
+	import type { Snippet } from "svelte";
 
 	let {
 		elem_classes = [],
@@ -11,9 +12,31 @@
 		visible = true,
 		autoscroll = false,
 		apply_default_css = true,
-		component_class_name = "HTML"
+		component_class_name = "HTML",
+		children
+	}: {
+		elem_classes: string[];
+		props: Record<string, any>;
+		html_template: string;
+		css_template: string;
+		js_on_load: string | null;
+		visible: boolean;
+		autoscroll: boolean;
+		apply_default_css: boolean;
+		component_class_name: string;
+		children?: Snippet;
 	} = $props();
 
+	let [has_children, pre_html_template, post_html_template] = $derived.by(
+		() => {
+			if (html_template.includes("@children") && children) {
+				const parts = html_template.split("@children");
+				return [true, parts[0] || "", parts.slice(1).join("@children") || ""];
+			}
+			return [false, html_template, ""];
+		}
+	);
+
 	let old_props = $state(JSON.parse(JSON.stringify(props)));
 
 	const dispatch = createEventDispatcher<{
@@ -29,11 +52,15 @@
 	};
 
 	let element: HTMLDivElement;
+	let pre_element: HTMLDivElement;
+	let post_element: HTMLDivElement;
 	let scrollable_parent: HTMLElement | null = null;
 	let random_id = `html-${Math.random().toString(36).substring(2, 11)}`;
 	let style_element: HTMLStyleElement | null = null;
 	let reactiveProps: Record<string, any> = {};
 	let currentHtml = $state("");
+	let currentPreHtml = $state("");
+	let currentPostHtml = $state("");
 	let currentCss = $state("");
 	let renderScheduled = $state(false);
 	let mounted = $state(false);
@@ -137,13 +164,17 @@
 		}
 	}
 
-	function updateDOM(oldHtml: string, newHtml: string): void {
-		if (!element || oldHtml === newHtml) return;
+	function updateDOM(
+		_element: HTMLElement | undefined,
+		oldHtml: string,
+		newHtml: string
+	): void {
+		if (!_element || oldHtml === newHtml) return;
 
 		const tempContainer = document.createElement("div");
 		tempContainer.innerHTML = newHtml;
 
-		const oldNodes = Array.from(element.childNodes);
+		const oldNodes = Array.from(_element.childNodes);
 		const newNodes = Array.from(tempContainer.childNodes);
 
 		const maxLength = Math.max(oldNodes.length, newNodes.length);
@@ -153,9 +184,9 @@
 			const newNode = newNodes[i];
 
 			if (!oldNode && newNode) {
-				element.appendChild(newNode.cloneNode(true));
+				_element.appendChild(newNode.cloneNode(true));
 			} else if (oldNode && !newNode) {
-				element.removeChild(oldNode);
+				_element.removeChild(oldNode);
 			} else if (oldNode && newNode) {
 				updateNode(oldNode, newNode);
 			}
@@ -237,11 +268,26 @@
 	}
 
 	function renderHTML(): void {
-		const newHtml = render_template(html_template, reactiveProps, "html");
-		if (element) {
-			updateDOM(currentHtml, newHtml);
+		if (has_children) {
+			const newPreHtml = render_template(
+				pre_html_template,
+				reactiveProps,
+				"html"
+			);
+			updateDOM(pre_element, currentPreHtml, newPreHtml);
+			currentPreHtml = newPreHtml;
+			const newPostHtml = render_template(
+				post_html_template,
+				reactiveProps,
+				"html"
+			);
+			updateDOM(post_element, currentPostHtml, newPostHtml);
+			currentPostHtml = newPostHtml;
+		} else {
+			const newHtml = render_template(html_template, reactiveProps, "html");
+			updateDOM(element, currentHtml, newHtml);
+			currentHtml = newHtml;
 		}
-		currentHtml = newHtml;
 		if (autoscroll) {
 			scroll_on_html_update();
 		}
@@ -258,7 +304,6 @@
 		}
 	}
 
-	// Mount effect
 	$effect(() => {
 		if (!element || mounted) return;
 		mounted = true;
@@ -288,8 +333,23 @@
 			}
 		);
 
-		currentHtml = render_template(html_template, reactiveProps, "html");
-		element.innerHTML = currentHtml;
+		if (has_children) {
+			currentPreHtml = render_template(
+				pre_html_template,
+				reactiveProps,
+				"html"
+			);
+			pre_element.innerHTML = currentPreHtml;
+			currentPostHtml = render_template(
+				post_html_template,
+				reactiveProps,
+				"html"
+			);
+			post_element.innerHTML = currentPostHtml;
+		} else {
+			currentHtml = render_template(html_template, reactiveProps, "html");
+			element.innerHTML = currentHtml;
+		}
 		update_css();
 
 		if (autoscroll) {
@@ -337,11 +397,24 @@
 	<div
 		bind:this={element}
 		id={random_id}
-		class="{apply_default_css ? 'prose gradio-style' : ''} {elem_classes.join(
-			' '
-		)}"
+		class="{apply_default_css && !has_children
+			? 'prose gradio-style'
+			: ''} {elem_classes.join(' ')}"
 		class:hide={!visible}
-	></div>
+		class:has_children
+	>
+		{#if has_children}
+			<div
+				class={apply_default_css ? "prose gradio-style" : ""}
+				bind:this={pre_element}
+			></div>
+			{@render children?.()}
+			<div
+				class={apply_default_css ? "prose gradio-style" : ""}
+				bind:this={post_element}
+			></div>
+		{/if}
+	</div>
 {/if}
 
 <style>
@@ -349,6 +422,12 @@
 		display: none;
 	}
 
+	.has_children {
+		display: flex;
+		flex-direction: column;
+		gap: var(--layout-gap);
+	}
+
 	.error-container {
 		padding: 12px;
 		background-color: #fee;