Skip to content

feat: show error in dev tools when using unsupported Svelte version #243

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

feat: show error in dev tools when using unsupported Svelte version #243

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions workspace/extension/src/constants/version.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
export const SVELTE_SUPPORTED_MAJOR_VERSIONS: number[] = [4];
5 changes: 5 additions & 0 deletions workspace/extension/src/lib/runtime.svelte.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,11 @@ function resolveEventBubble(node: any) {

port.onMessage.addListener(({ type, payload }) => {
switch (type) {
case 'bridge::ext/svelte_version:set': {
app.svelteVersion = payload;
break;
}

case 'bridge::ext/clear': {
app.nodes = {};
app.selected = undefined;
Expand Down
24 changes: 20 additions & 4 deletions workspace/extension/src/lib/state.svelte.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,19 @@
type Overwrite<A, B> = Omit<A, keyof B> & B;

type AppState = {
svelteVersion?: number;

nodes: Record<string, DebugNode>;
root: Readonly<DebugNode[]>;

selected?: DebugNode;
hovered?: DebugNode;

inspecting: boolean;
query: string;
}


export type DebugNode = Overwrite<
SvelteBlockDetail,
{
Expand Down Expand Up @@ -28,15 +42,17 @@ export type DebugNode = Overwrite<
}
>;

export const app = $state({
nodes: {} as { [key: string]: DebugNode },
export const app: AppState = $state({
svelteVersion: undefined,

nodes: {} as Record<string, DebugNode>,
get root() {
const nodes = Object.values(this.nodes);
return nodes.filter((node) => !node.parent);
},

selected: undefined as undefined | DebugNode,
hovered: undefined as undefined | DebugNode,
selected: undefined,
hovered: undefined,

inspecting: false,
query: '',
Expand Down
21 changes: 20 additions & 1 deletion workspace/extension/src/routes/ConnectMessage.svelte
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,9 +1,27 @@
<script>
import { background } from '$lib/runtime.svelte';
import { app } from '$lib/state.svelte';
import { SVELTE_SUPPORTED_MAJOR_VERSIONS } from '../constants/version';
</script>

<main>
<h1 style:font-size="3rem">Svelte DevTools</h1>
{#if app.svelteVersion && !SVELTE_SUPPORTED_MAJOR_VERSIONS.includes(app.svelteVersion)}
<h1 style:font-size="3rem">Svelte DevTools</h1>
<p style:display="inline-flex" style:font-size="1.25rem">
<span>Unsupported Svelte version detected</span>

<button onclick={() => background.send('bypass::ext/page->refresh')}>reload</button>
</p>

<footer>
<p style:font-size="1rem">Svelte app is using an unsupported major version.</p>
<ul>
<li>Currently using Svelte version ^{app.svelteVersion}.0.0</li>
Copy link

@WilliamOConnell WilliamOConnell Oct 1, 2025 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Is there a reason to show the version with .0.0 appended? That seems like it could be confusing since it might not match the actual patch version in use, and it looks like the supported versions aren't displayed that way.

Copy link
Author

@Kolby11 Kolby11 Oct 3, 2025 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I mean it has "^" character prepended which is a technically correct term. Since i have not found any way to find the minor and patch version, only the major one, I decided to stick with the convention from this message.
<li>Use Svelte version ^4.0.0?</li>

<li>Supported major versions: {SVELTE_SUPPORTED_MAJOR_VERSIONS.join(', ')}</li>
</ul>
</footer>
{:else}
<h1 style:font-size="3rem">Svelte DevTools</h1>
<p style:display="inline-flex" style:font-size="1.25rem">
<span>No Svelte app detected</span>

Expand All @@ -17,6 +35,7 @@
<li>Use Svelte version ^4.0.0?</li>
</ul>
</footer>
{/if}
</main>

<style>
Expand Down
19 changes: 14 additions & 5 deletions workspace/extension/static/background.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ chrome.runtime.onConnect.addListener((port) => {
if (!chrome.tabs.onUpdated.hasListener(courier)) {
chrome.tabs.onUpdated.addListener(courier);
}
sensor(message.tabId);
break;
}
case 'bypass::ext/page->refresh': {
Expand All @@ -40,10 +41,13 @@ chrome.runtime.onConnect.addListener((port) => {
chrome.runtime.onMessage.addListener((message, sender) => {
if (sender.id !== chrome.runtime.id) return; // unexpected sender

if (message.type === 'bypass::ext/icon:set') {
if (message.type === 'bridge::ext/svelte_version:set' && sender.tab?.id) {
const selected = message.payload ? 'default' : 'disabled';
const icons = [16, 24, 48, 96, 128].map((s) => [s, `icons/${selected}-${s}.png`]);
return chrome.action.setIcon({ path: Object.fromEntries(icons) });
chrome.action.setIcon({
path: Object.fromEntries(icons),
tabId: sender.tab.id
});
}

const port = sender.tab?.id && ports.get(sender.tab.id);
Expand Down Expand Up @@ -107,17 +111,19 @@ async function sensor(tabId) {
});
},
});
// Small delay to let Svelte load
await new Promise(resolve => setTimeout(resolve, 100));
// capture data to send to listener
await chrome.scripting.executeScript({
target: { tabId },
world: 'MAIN',
func: () => {
// @ts-ignore - injected if the website is using svelte
const [major] = [...(window.__svelte?.v ?? [])];
const [major] = [...(window.__svelte?.v ?? [])].map(v => parseInt(v));

document.dispatchEvent(
new CustomEvent('SvelteDevTools', {
detail: { type: 'bypass::ext/icon:set', payload: major },
detail: { type: 'bridge::ext/svelte_version:set', payload: major },
}),
);
},
Expand All @@ -126,6 +132,9 @@ async function sensor(tabId) {
// for internal URLs like `chrome://` or `edge://` and extension gallery
// https://chromium.googlesource.com/chromium/src/+/ee77a52baa1f8a98d15f9749996f90e9d3200f2d/chrome/common/extensions/chrome_extensions_client.cc#131
const icons = [16, 24, 48, 96, 128].map((s) => [s, `icons/disabled-${s}.png`]);
chrome.action.setIcon({ path: Object.fromEntries(icons) });
chrome.action.setIcon({
path: Object.fromEntries(icons),
tabId: tabId
});
}
}