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6.0.0-dev.6/html/Index.svelte

@@ -76,6 +76,7 @@
 			visible={gradio.shared.visible}
 			autoscroll={gradio.shared.autoscroll}
 			apply_default_css={gradio.props.apply_default_css}
+			component_class_name={gradio.props.component_class_name}
 			on:event={(e) => {
 				gradio.dispatch(e.detail.type, e.detail.data);
 			}}

6.0.0-dev.6/html/shared/HTML.svelte

@@ -10,7 +10,8 @@
 		js_on_load = null,
 		visible = true,
 		autoscroll = false,
-		apply_default_css = true
+		apply_default_css = true,
+		component_class_name = "HTML"
 	} = $props();
 
 	let old_props = $state(props);
@@ -36,6 +37,7 @@
 	let currentCss = $state("");
 	let renderScheduled = $state(false);
 	let mounted = $state(false);
+	let error_message: string | null = $state(null);
 
 	function get_scrollable_parent(element: HTMLElement): HTMLElement | null {
 		let parent = element.parentElement;
@@ -102,10 +104,12 @@
 				...propKeys,
 				`return \`${handlebarsRendered}\`;`
 			);
+			error_message = null;
 			return templateFunc(...propValues);
 		} catch (e) {
 			console.error("Error evaluating template:", e);
-			return "--- Error rendering template ---";
+			error_message = e instanceof Error ? e.message : String(e);
+			return "";
 		}
 	}
 
@@ -314,17 +318,54 @@
 	});
 </script>
 
-<div
-	bind:this={element}
-	id={random_id}
-	class="{apply_default_css ? 'prose gradio-style' : ''} {elem_classes.join(
-		' '
-	)}"
-	class:hide={!visible}
-></div>
+{#if error_message}
+	<div class="error-container">
+		<strong class="error-title"
+			>Error rendering <code class="error-component-name"
+				>{component_class_name}</code
+			>:</strong
+		>
+		<code class="error-message">{error_message}</code>
+	</div>
+{:else}
+	<div
+		bind:this={element}
+		id={random_id}
+		class="{apply_default_css ? 'prose gradio-style' : ''} {elem_classes.join(
+			' '
+		)}"
+		class:hide={!visible}
+	></div>
+{/if}
 
 <style>
 	.hide {
 		display: none;
 	}
+
+	.error-container {
+		padding: 12px;
+		background-color: #fee;
+		border: 1px solid #fcc;
+		border-radius: 4px;
+		color: #c33;
+		font-family: monospace;
+		font-size: 13px;
+	}
+
+	.error-title {
+		display: block;
+		margin-bottom: 8px;
+	}
+
+	.error-component-name {
+		background-color: #fdd;
+		padding: 2px 4px;
+		border-radius: 2px;
+	}
+
+	.error-message {
+		white-space: pre-wrap;
+		word-break: break-word;
+	}
 </style>

6.0.0-dev.6/html/types.ts

@@ -8,6 +8,7 @@ export interface HTMLProps {
 	min_height: number | undefined;
 	max_height: number | undefined;
 	props: Record<string, any>;
+	component_class_name: string;
 }
 
 export interface HTMLEvents {