Update Svelte

2022-09-02 23:36:40 +05:30
26 changed files with 156 additions and 126 deletions
@@ -48,4 +48,3 @@ jobs:
          parallel: true
        env:
          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
-          MERMAID_DISABLE_DEBOUNCE: 'true'
@@ -3,6 +3,5 @@
 	"cSpell.words": ["pako", "Serde", "serdes"],
 	"vitest.commandLine": "yarn test:unit",
 	"vitest.enable": true,
-	"testing.autoRun.mode": "rerun",
-	"svelte.enable-ts-plugin": true
+	"testing.autoRun.mode": "rerun"
 }
@@ -1,8 +1,9 @@
-import { verifyFileSize } from './util';
+import { disableDebounce, verifyFileSize } from './util';
 describe('Check actions', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/edit');
+		disableDebounce();
 	});

 	it('should update markdown code', () => {
@@ -1,9 +1,10 @@
-import { getEditor, cmd } from './util';
+import { getEditor, cmd, disableDebounce } from './util';

 describe('Auto sync tests', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/');
+		disableDebounce();
 	});

 	it('should dim diagram when code is edited', () => {
@@ -71,6 +72,7 @@ describe.only('Pan and Zoom', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/');
+		disableDebounce();
 	});
 	it('should toggle pan and zoom', () => {
 		cy.get('#svg-pan-zoom-reset-pan-zoom').should('not.exist');
@@ -1,11 +1,11 @@
-import { getEditor, verifyFileSnapshot } from './util';
+import { getEditor, disableDebounce, verifyFileSnapshot } from './util';

 describe('Save History', () => {
 	beforeEach(() => {
 		cy.clock(new Date(2022, 0, 1).getTime());
 		cy.clearLocalStorage();
 		cy.visit('/edit');
-
+		disableDebounce();
 		cy.contains('Actions').click();
 		cy.contains('History').click();
 	});
@@ -17,11 +17,11 @@ describe('Save History', () => {
 	it('should load history from localstorage', () => {
 		cy.setLocalStorage(
 			'manualHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"manual","id":"d7ea820e-21dd-418a-b984-fd58acde09df","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","id":"b749ffc6-522b-4a44-86cf-7c1ffc3146b3","name":"helpful-ocean"}]'
+			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"manual","id":"d7ea820e-21dd-418a-b984-fd58acde09df","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","id":"b749ffc6-522b-4a44-86cf-7c1ffc3146b3","name":"helpful-ocean"}]'
 		);
 		cy.setLocalStorage(
 			'autoHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"auto","id":"69ea820e-522b-4a44-86cf-fd58acde09df","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","id":"x749ffc6-21dd-418a-b984-7c1ffc3146b3","name":"needy-mosquito"}]'
+			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"auto","id":"69ea820e-522b-4a44-86cf-fd58acde09df","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","id":"x749ffc6-21dd-418a-b984-7c1ffc3146b3","name":"needy-mosquito"}]'
 		);
 		cy.reload();
 		cy.contains('Actions').click();
@@ -1,9 +1,11 @@
 import { toBase64 } from 'js-base64';
+import { disableDebounce } from './util';

 describe('Site Loads', () => {
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/');
+		disableDebounce();
 	});
 	it('Check Home page load', () => {
 		cy.url().should('include', '/edit');
@@ -58,7 +60,7 @@ describe('Site Loads', () => {
 	// Disabled temporarily. Should be enabled after the issue is fixed in Mermaid.
 	// it('should prevent setting the "securityLevel" option via URL', () => {
 	// 	const b64State = toBase64(
-	// 		`{"code":"graph TD\\nA[\\"<img src='https://via.placeholder.com/64' width=64 />\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","autoSync":true,"updateDiagram":true}`,
+	// 		`{"code":"graph TD\\nA[\\"<img src='https://via.placeholder.com/64' width=64 />\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
 	// 		true
 	// 	);
 	// 	cy.on('window:confirm', () => true);
@@ -73,7 +75,7 @@ describe('Site Loads', () => {

 	it('should allow persisting "securityLevel" using confirm dialogue', () => {
 		const b64State = toBase64(
-			`{"code":"graph TD\\nA[\\"<img src='https://dummyimage.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","autoSync":true,"updateDiagram":true}`,
+			`{"code":"graph TD\\nA[\\"<img src='https://dummyimage.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
 			true
 		);
 		cy.on('window:confirm', () => false);
@@ -8,6 +8,8 @@ export const getEditor = ({ bottom = true, newline = false } = {}) =>
 		.type(`${bottom ? '{pageDown}' : cmd}`)
 		.type(`${newline ? '{enter}' : cmd}`);

+export const disableDebounce = () => cy.setLocalStorage('noDebounce', 'true');
+
 const downloadsFolder = Cypress.config('downloadsFolder');

 export const verifyFileSize = (
@@ -1,28 +1,28 @@
 module.exports = {
  "Site Loads": {
    "Check Home page load": {
-      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n  \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":true}"
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n  \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":true,\"autoSync\":true,\"updateDiagram\":true}"
    },
    "Check Redirect from old URL": {
-      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":true}"
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true}"
    },
    "should load diagram from gist": {
-      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a\"}}}"
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a\"}}}"
    },
    "should load diagram from gist revision": {
-      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/ec9b4ab0e41e4ff6287326cd3cb47affd7851e19\"}}}"
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/ec9b4ab0e41e4ff6287326cd3cb47affd7851e19\"}}}"
    },
    "should load diagram from raw files": {
-      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"files\",\"config\":{\"codeURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/code.mmd\",\"configURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/config.json\"}}}"
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"files\",\"config\":{\"codeURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/code.mmd\",\"configURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/config.json\"}}}"
    }
  },
  "__version": "10.6.0",
  "Auto sync tests": {
    "should dim diagram when code is edited": {
-      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Test\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":false,\"updateDiagram\":false}"
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Test\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":false,\"updateDiagram\":false}"
    },
    "should not dim diagram when code is in sync": {
-      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Testing\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":false}"
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Testing\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":false}"
    }
  },
  "Test themes": {
@@ -5,7 +5,6 @@
 	"license": "MIT",
 	"scripts": {
 		"dev": "vite dev",
-		"dev:test": "MERMAID_DISABLE_DEBOUNCE=true yarn dev",
 		"build": "vite build",
 		"preview": "vite preview",
 		"lint": "prettier --check --cache --plugin-search-dir=. .;eslint --ignore-path .gitignore .",
@@ -56,7 +55,7 @@
 		"postcss-load-config": "4.0.1",
 		"prettier": "2.7.1",
 		"prettier-plugin-svelte": "2.7.0",
-		"svelte": "3.49.0",
+		"svelte": "3.50.0",
 		"svelte-preprocess": "4.10.7",
 		"tailwindcss": "3.1.8",
 		"tslib": "2.4.0",
@@ -5,7 +5,6 @@
 	export let isCloseable = true;
 	export let isOpen = true;
 	export let tabs: Tab[] = [];
-	export let activeTabID: string = '';
 	export let title: string;
 	$: isOpen = isCloseable ? isOpen : true;
 	$: isTabsShown = isOpen && tabs.length > 0;
@@ -16,7 +15,7 @@
 		class="bg-primary p-2 {isTabsShown ? 'pb-0' : ''} flex-none cursor-pointer"
 		on:click={() => (isOpen = !isOpen)}>
 		<div class="flex justify-between">
-			<Tabs on:select {tabs} bind:isOpen {title} {isCloseable} {activeTabID} />
+			<Tabs on:select {tabs} bind:isOpen {title} {isCloseable} />
 			<div class="flex gap-x-4 items-center {isTabsShown ? '-mt-2' : ''}">
 				<slot name="actions" />
 			</div>
@@ -3,14 +3,12 @@
 	import { createEventDispatcher } from 'svelte';
 	import { fade } from 'svelte/transition';
 	export let isCloseable = true;
-	export let tabs: Tab[];
+	export let tabs: Tab[] = [];
 	export let title: string;
 	export let isOpen = false;
-	export let activeTabID: string;

-	if (!activeTabID && tabs.length > 0) {
-		activeTabID = tabs[0].id;
-	}
+	$: activeTabID = tabs[0]?.id;
+
 	const dispatch = createEventDispatcher<TabEvents>();
 	const toggleTabs = (tab: Tab) => {
 		activeTabID = tab.id;
@@ -1,95 +1,77 @@
 <script lang="ts">
-	import type { EditorMode } from '$lib/types';
-	import { stateStore, updateCode, updateConfig } from '$lib/util/state';
+	import type { EditorEvents } from '$lib/types';
+	import { stateStore } from '$lib/util/state';
 	import { themeStore } from '$lib/util/theme';
 	import { syncDiagram } from '$lib/util/util';
 	import type monaco from 'monaco-editor';
-	import { onMount } from 'svelte';
+	import { createEventDispatcher, onMount } from 'svelte';
 	import initEditor from 'monaco-mermaid';
 	import { logEvent } from '$lib/util/stats';
-	import { debounceEnabled } from '$lib/util/env';

 	let divEl: HTMLDivElement = null;
 	let editor: monaco.editor.IStandaloneCodeEditor;
-	let Monaco: typeof monaco;
-	let editorOptions: monaco.editor.IStandaloneEditorConstructionOptions = {
+	let Monaco;
+
+	export let text: string;
+	export let language: string;
+	export let editorOptions: monaco.editor.IStandaloneEditorConstructionOptions = {
+		value: text,
+		language: language,
 		minimap: {
 			enabled: false
 		},
 		theme: 'mermaid',
 		overviewRulerLanes: 0
 	};
-	let text = '';
+	let oldText = text;
+	$: editor && Monaco?.editor.setModelLanguage(editor.getModel(), language);

-	stateStore.subscribe(({ errorMarkers, editorMode, code, mermaid }) => {
-		if (!editor) return;
-
-		// Update editor text if it's different
-		const newText = editorMode === 'code' ? code : mermaid;
-		if (newText !== text) {
-			editor.setValue(newText);
-			text = newText;
+	const handleTextUpdate = (newText: string) => {
+		if (newText !== oldText) {
+			if ($stateStore.updateEditor) {
+				editor?.setValue(newText);
+			}
+			oldText = newText;
 		}
+	};

-		// Update editor mode if it's different
-		const language = editorMode === 'code' ? 'mermaid' : 'json';
-		if (editor.getModel().getLanguageId() !== language) {
-			Monaco?.editor.setModelLanguage(editor.getModel(), language);
-		}
-
-		// Display errors if present
-		if (errorMarkers.length > 0) {
-			Monaco?.editor.setModelMarkers(editor.getModel(), 'test', errorMarkers);
-		}
+	$: handleTextUpdate(text);
+	stateStore.subscribe(({ errorMarkers }) => {
+		editor && Monaco?.editor.setModelMarkers(editor.getModel(), 'test', errorMarkers);
 	});

 	themeStore.subscribe(({ isDark }) => {
 		editor && Monaco?.editor.setTheme(isDark ? 'mermaid-dark' : 'mermaid');
 	});

-	const handleUpdate = (text: string, mode: EditorMode) => {
-		if (mode === 'code') {
-			updateCode(text);
-		} else {
-			updateConfig(text);
-		}
-	};
-
-	// Debounce state updates to avoid performance issues
-	let debounce: { [key: string]: number } = {};
-	const updateHandler = (newText: string) => {
-		text = newText;
-		const mode = $stateStore.editorMode;
-		if (debounceEnabled) {
-			clearTimeout(debounce[mode]);
-			debounce[mode] = window.setTimeout(() => {
-				handleUpdate(text, mode);
-			}, 300);
-		} else {
-			handleUpdate(text, mode);
-		}
-	};
-
+	const dispatch = createEventDispatcher<EditorEvents>();
 	const loadMonaco = async () => {
 		let i = 0;
-		while (i++ < 500) {
+		while (i++ < 10) {
 			try {
 				// @ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
-				Monaco = window.monaco;
+				Monaco = monaco;
 				return;
 			} catch {
-				await new Promise((r) => setTimeout(r, 100));
+				await new Promise((r) => setTimeout(r, 500));
 			}
 		}
 		alert('Loading Monaco Editor failed. Please try refreshing the page.');
 	};
-
 	onMount(async () => {
-		await loadMonaco(); // Fix https://github.com/mermaid-js/mermaid-live-editor/issues/175
+		try {
+			// @ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
+			Monaco = monaco;
+		} catch {
+			await loadMonaco(); // Fix https://github.com/mermaid-js/mermaid-live-editor/issues/175
+		}
 		initEditor(Monaco);
 		editor = Monaco.editor.create(divEl, editorOptions);
 		editor.onDidChangeModelContent(() => {
-			updateHandler(editor.getValue());
+			oldText = editor.getValue();
+			dispatch('update', {
+				text: oldText
+			});
 		});
 		editor.addAction({
 			id: 'mermaid-render-diagram',
@@ -90,7 +90,7 @@
 	};

 	const restoreHistoryItem = (state: State): void => {
-		inputStateStore.set({ ...state, updateDiagram: true });
+		inputStateStore.set({ ...state, updateEditor: true, updateDiagram: true });
 	};

 	const relativeTime = (time: number) => {
@@ -95,11 +95,11 @@ describe('history migration', () => {
 	it('should inject history IDs as migration', () => {
 		window.localStorage.setItem(
 			'manualHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"manual","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"helpful-ocean"}]'
+			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"manual","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"helpful-ocean"}]'
 		);
 		window.localStorage.setItem(
 			'autoHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"auto","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"needy-mosquito"}]'
+			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"auto","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"needy-mosquito"}]'
 		);
 		let manualHistoryStore: HistoryEntry[] = JSON.parse(
 			window.localStorage.getItem('manualHistoryStore')
@@ -98,6 +98,7 @@
 	const loadSampleDiagram = (diagramType: string): void => {
 		updateCode(samples[diagramType], {
 			updateDiagram: true,
+			updateEditor: true,
 			resetPanZoom: true
 		});
 		void logEvent('loadSampleDiagram', { diagramType });
@@ -94,7 +94,7 @@
 					outOfSync = true;
 				}
 			} catch (e) {
-				console.error('view fail', e);
+				console.log('view fail', e);
 				error = true;
 			}
 		});
@@ -16,6 +16,13 @@ export interface MarkerData {
 	endColumn: number;
 }

+export interface EditorUpdateEvent {
+	text: string;
+}
+export interface EditorEvents {
+	update: EditorUpdateEvent;
+}
+
 export interface TabEvents {
 	select: Tab;
 }
@@ -29,9 +36,9 @@ export interface Tab {
 export interface State {
 	code: string;
 	mermaid: string;
+	updateEditor: boolean;
 	updateDiagram: boolean;
 	autoSync: boolean;
-	editorMode?: EditorMode;
 	panZoom?: boolean;
 	pan?: { x: number; y: number };
 	zoom?: number;
@@ -39,7 +46,6 @@ export interface State {
 }

 export interface ValidatedState extends State {
-	editorMode: EditorMode;
 	error: unknown;
 	errorMarkers: MarkerData[];
 	serialized: string;
@@ -80,7 +86,5 @@ export interface DocConfig {
 	};
 }

-export type EditorMode = 'code' | 'config';
-
 export type Loader = (url: string) => Promise<State>;
 export type Optional<T, K extends keyof T> = Pick<Partial<T>, K> & Omit<T, K>;
@@ -2,4 +2,3 @@ export const rendererUrl: string =
 	(import.meta.env.MERMAID_RENDERER_URL as string) ?? 'https://mermaid.ink';
 export const krokiRendererUrl: string =
 	(import.meta.env.MERMAID_KROKI_RENDERER_URL as string) ?? 'https://kroki.io';
-export const debounceEnabled: boolean = import.meta.env.MERMAID_DISABLE_DEBOUNCE !== 'true';
@@ -54,6 +54,7 @@ export const loadDataFromUrl = async (): Promise<void> => {
 		updateCodeStore({
 			...state,
 			autoSync: true,
-			updateDiagram: true
+			updateDiagram: true,
+			updateEditor: true
 		});
 };
@@ -5,11 +5,11 @@ describe('migrations', () => {
 	beforeEach(() => {
 		window.localStorage.setItem(
 			'manualHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"manual","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"helpful-ocean"}]'
+			'[{"state":{"code":"graph TD\\n    A[Halloween] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"manual","name":"hollow-art"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"helpful-ocean"}]'
 		);
 		window.localStorage.setItem(
 			'autoHistoryStore',
-			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"auto","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"needy-mosquito"}]'
+			'[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":false,"autoSync":true,"updateDiagram":false},"time":0,"type":"auto","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","updateEditor":true,"autoSync":true,"updateDiagram":true},"time":0,"type":"manual","name":"needy-mosquito"}]'
 		);
 	});

@@ -13,19 +13,19 @@ describe('Serde tests', () => {

 	it('should serialize and deserialize with default serde', () => {
 		expect(verifySerde(defaultState)).toMatchInlineSnapshot(
-			'"pako:eNpVj81qw0AMhF9F6NRC_AI-BGK7zSXQQHLz5iBsObuk-8Naphjb7551fEl1EjPfiNGEjW8Zc7xHChqulXKQ5lCXOppeLPU3yLL9fGQB6x2PMxQfRw-99iEYd__c-GKFoJxOK8Yg2rjHslnlK__jeIaqPlEQH27vzvXPz_BVm7NO5_87OnJKfdcd5R1lDUUoKb4Q3KHlaMm0qfq0KgpFs2WFeVpb7mj4FYXKLQmlQfxldA3mEgfe4RBaEq4MpaftJi5PNtJU8w"'
+			'"pako:eNpVkM1qw0AMhF9F6JRC_AI-FBo7ySXQQnPz5iC8cnZp9oe1TAm2373rmEKik5j5ZhAasQ2ascRromjgXCsPeT6ayiTbi6P-AkXxPh1ZwAXP9wl2m2OA3oQYrb--rfxugaAaTwvGIMb6n3m1qkf-0_MEdXOiKCFenp3zb5hg39gvk-tfHZM4pw5NR2VHRUsJKkoPBLfoODmyOp8-LopCMexYYZlXzR0NN1Go_JzRIWoS3msrIWGuuvW8RRokfN99i6Wkgf-h2lL-hFvF-Q9-YFyS"'
 		);
 	});

 	it('should serialize and deserialize with base64 serde', () => {
 		expect(verifySerde(defaultState, 'base64')).toMatchInlineSnapshot(
-			'"base64:eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl1cbiAgIiwibWVybWFpZCI6IntcbiAgXCJ0aGVtZVwiOiBcImRlZmF1bHRcIlxufSIsImF1dG9TeW5jIjp0cnVlLCJ1cGRhdGVEaWFncmFtIjp0cnVlfQ"'
+			'"base64:eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl1cbiAgIiwibWVybWFpZCI6IntcbiAgXCJ0aGVtZVwiOiBcImRlZmF1bHRcIlxufSIsInVwZGF0ZUVkaXRvciI6ZmFsc2UsImF1dG9TeW5jIjp0cnVlLCJ1cGRhdGVEaWFncmFtIjp0cnVlfQ"'
 		);
 	});

 	it('should serialize and deserialize with pako serde', () => {
 		expect(verifySerde(defaultState, 'pako')).toMatchInlineSnapshot(
-			'"pako:eNpVj81qw0AMhF9F6NRC_AI-BGK7zSXQQHLz5iBsObuk-8Naphjb7551fEl1EjPfiNGEjW8Zc7xHChqulXKQ5lCXOppeLPU3yLL9fGQB6x2PMxQfRw-99iEYd__c-GKFoJxOK8Yg2rjHslnlK__jeIaqPlEQH27vzvXPz_BVm7NO5_87OnJKfdcd5R1lDUUoKb4Q3KHlaMm0qfq0KgpFs2WFeVpb7mj4FYXKLQmlQfxldA3mEgfe4RBaEq4MpaftJi5PNtJU8w"'
+			'"pako:eNpVkM1qw0AMhF9F6JRC_AI-FBo7ySXQQnPz5iC8cnZp9oe1TAm2373rmEKik5j5ZhAasQ2ascRromjgXCsPeT6ayiTbi6P-AkXxPh1ZwAXP9wl2m2OA3oQYrb--rfxugaAaTwvGIMb6n3m1qkf-0_MEdXOiKCFenp3zb5hg39gvk-tfHZM4pw5NR2VHRUsJKkoPBLfoODmyOp8-LopCMexYYZlXzR0NN1Go_JzRIWoS3msrIWGuuvW8RRokfN99i6Wkgf-h2lL-hFvF-Q9-YFyS"'
 		);
 	});

@@ -23,6 +23,7 @@ export const defaultState: State = {
 		null,
 		2
 	),
+	updateEditor: false,
 	autoSync: true,
 	updateDiagram: true
 };
@@ -47,10 +48,8 @@ export const stateStore: Readable<ValidatedState> = derived([inputStateStore], (
 		...state,
 		serialized: '',
 		errorMarkers: [],
-		error: undefined,
-		editorMode: state.editorMode ?? 'code'
+		error: undefined
 	};
-
 	// No changes should be done to fields part of `state`.
 	try {
 		processed.serialized = serializeState(state);
@@ -103,12 +102,11 @@ export const loadState = (data: string): void => {
 			state.mermaid = defaultState.mermaid;
 		}
 	}
-	updateCodeStore({ ...state });
+	updateCodeStore({ ...state, updateEditor: true });
 };

 export const updateCodeStore = (newState: Partial<State>): void => {
 	inputStateStore.update((state) => {
-		// console.log({ newState, state });
 		return { ...state, ...newState };
 	});
 };
@@ -117,9 +115,10 @@ let prompted = false;
 export const updateCode = (
 	code: string,
 	{
+		updateEditor,
 		updateDiagram = false,
 		resetPanZoom = false
-	}: { updateDiagram?: boolean; resetPanZoom?: boolean } = {}
+	}: { updateEditor: boolean; updateDiagram?: boolean; resetPanZoom?: boolean }
 ): void => {
 	saveStatistics(code);
 	const lines = (code.match(/\n/g) || '').length + 1;
@@ -141,13 +140,13 @@ export const updateCode = (
 			state.pan = undefined;
 			state.zoom = undefined;
 		}
-		return { ...state, code, updateDiagram };
+		return { ...state, code, updateEditor, updateDiagram };
 	});
 };

-export const updateConfig = (config: string): void => {
+export const updateConfig = (config: string, updateEditor: boolean): void => {
 	inputStateStore.update((state) => {
-		return { ...state, mermaid: config };
+		return { ...state, mermaid: config, updateEditor };
 	});
 };

@@ -158,7 +157,7 @@ export const toggleDarkTheme = (dark: boolean): void => {
 			config.theme = dark ? 'dark' : 'default';
 		}

-		return { ...state, mermaid: JSON.stringify(config, null, 2) };
+		return { ...state, mermaid: JSON.stringify(config, null, 2), updateEditor: true };
 	});
 };

@@ -2,7 +2,6 @@ import { initURLSubscription, loadState, updateCodeStore } from './state';
 import { analytics, initAnalytics } from './stats';
 import { loadDataFromUrl } from './fileLoaders/loader';
 import { initLoading } from './loading';
-import { applyMigrations } from './migrations';

 export const loadStateFromURL = (): void => {
 	loadState(window.location.hash.slice(1));
@@ -15,7 +14,6 @@ export const syncDiagram = (): void => {
 };

 export const initHandler = async (): Promise<void> => {
-	applyMigrations();
 	loadStateFromURL();
 	await initLoading('Loading Gist...', loadDataFromUrl().catch(console.error));
 	syncDiagram();
@@ -26,3 +24,5 @@ export const initHandler = async (): Promise<void> => {

 export const isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0;
 export const cmdKey = isMac ? 'Cmd' : 'Ctrl';
+
+export const debounceEnabled = window.localStorage.getItem('noDebounce') !== 'true';
@@ -6,10 +6,12 @@
 	import { setTheme, themeStore } from '$lib/util/theme';
 	import { toggleDarkTheme } from '$lib/util/state';
 	import { initHandler } from '$lib/util/util';
+	import { applyMigrations } from '$lib/util/migrations';

 	// This can be removed once https://github.com/sveltejs/kit/issues/1612 is fixed.
 	// Then move it into src and vite will bundle it automatically.
 	onMount(() => {
+		applyMigrations();
 		window.addEventListener('hashchange', async (ev) => {
 			await initHandler();
 		});
@@ -6,12 +6,20 @@
 	import View from '$lib/components/view.svelte';
 	import Card from '$lib/components/card/card.svelte';
 	import History from '$lib/components/history/history.svelte';
-	import { inputStateStore, stateStore, updateCodeStore } from '$lib/util/state';
-	import { cmdKey, initHandler, syncDiagram } from '$lib/util/util';
+	import { updateCode, updateConfig, inputStateStore, stateStore } from '$lib/util/state';
+	import { cmdKey, debounceEnabled, initHandler, syncDiagram } from '$lib/util/util';
 	import { onMount } from 'svelte';
-	import type { Tab, DocConfig, EditorMode, ValidatedState } from '$lib/types';
+	import type { EditorUpdateEvent, State, Tab, DocConfig } from '$lib/types';
 	import { base } from '$app/paths';

+	type Modes = 'code' | 'config';
+	type Languages = 'mermaid' | 'json';
+
+	let selectedMode: Modes = 'code';
+	const languageMap: { [key in Modes]: Languages } = {
+		code: 'mermaid',
+		config: 'json'
+	};
 	const docURLBase = 'https://mermaid-js.github.io/mermaid';
 	const docMap: DocConfig = {
 		graph: {
@@ -52,23 +60,34 @@
 			config: '/#/gitgraph?id=gitgraph-specific-configuration-options'
 		}
 	};
+	let text = '';
 	let docURL = docURLBase;
-	let activeTabID = 'code';
-	stateStore.subscribe(({ code, editorMode }: ValidatedState) => {
-		activeTabID = editorMode;
-		const codeTypeMatch = /([\S]+)[\s\n]/.exec(code);
+	let language: Languages = 'mermaid';
+	const handleModeUpdate = (mode: Modes) => {
+		if (mode === 'code') {
+			text = $stateStore.code;
+		} else {
+			text = $stateStore.mermaid;
+		}
+	};
+	$: language = languageMap[selectedMode];
+	$: handleModeUpdate(selectedMode);
+
+	stateStore.subscribe((state: State) => {
+		if (state.updateEditor) {
+			text = selectedMode === 'code' ? state.code : state.mermaid;
+		}
+		const codeTypeMatch = /([\S]+)[\s\n]/.exec(state.code);
 		if (codeTypeMatch && codeTypeMatch.length > 1) {
 			const docKey = codeTypeMatch[1];
 			const docConfig = docMap[docKey] ?? { code: '' };
-			docURL = docURLBase + (docConfig[editorMode] ?? docConfig.code ?? '');
+			docURL = docURLBase + (docConfig[selectedMode] ?? docConfig.code ?? '');
 		}
 	});
-
 	const tabSelectHandler = (message: CustomEvent<Tab>) => {
-		const editorMode: EditorMode = message.detail.id === 'code' ? 'code' : 'config';
-		updateCodeStore({ editorMode });
+		selectedMode = message.detail.id === 'code' ? 'code' : 'config';
+		$inputStateStore.updateEditor = true;
 	};
-
 	const tabs: Tab[] = [
 		{
 			id: 'code',
@@ -82,6 +101,28 @@
 		}
 	];

+	const handleUpdate = (text: string) => {
+		if (selectedMode === 'code') {
+			updateCode(text, {
+				updateEditor: false
+			});
+		} else {
+			updateConfig(text, false);
+		}
+	};
+
+	let debounce: { [key: string]: number } = {};
+	const updateHandler = ({ detail: { text } }: CustomEvent<EditorUpdateEvent>) => {
+		if (debounceEnabled) {
+			clearTimeout(debounce[selectedMode]);
+			debounce[selectedMode] = window.setTimeout(() => {
+				handleUpdate(text);
+			}, 300);
+		} else {
+			handleUpdate(text);
+		}
+	};
+
 	onMount(async () => {
 		await initHandler();
 		const resizer = document.getElementById('resizeHandler');
@@ -108,7 +149,7 @@
 	<Navbar />
 	<div class="flex-1 flex overflow-hidden">
 		<div class="hidden md:flex flex-col" id="editorPane" style="width: 40%">
-			<Card on:select={tabSelectHandler} {tabs} isCloseable={false} {activeTabID} title="Mermaid">
+			<Card on:select={tabSelectHandler} {tabs} isCloseable={false} title="Mermaid">
 				<div slot="actions" class="flex flex-row items-center">
 					<div class="form-control flex-row items-center">
 						<label class="cursor-pointer label" for="autoSync">
@@ -134,7 +175,7 @@
 					</button>
 				</div>

-				<Editor />
+				<Editor on:update={updateHandler} {language} {text} />
 			</Card>

 			<div class="-mt-2">
@@ -5014,10 +5014,10 @@ svelte-preprocess@4.10.7:
    sorcery "^0.10.0"
    strip-indent "^3.0.0"

-svelte@3.49.0:
-  version "3.49.0"
-  resolved "https://registry.yarnpkg.com/svelte/-/svelte-3.49.0.tgz#5baee3c672306de1070c3b7888fc2204e36a4029"
-  integrity sha512-+lmjic1pApJWDfPCpUUTc1m8azDqYCG1JN9YEngrx/hUyIcFJo6VZhj0A1Ai0wqoHcEIuQy+e9tk+4uDgdtsFA==
+svelte@3.50.0:
+  version "3.50.0"
+  resolved "https://registry.yarnpkg.com/svelte/-/svelte-3.50.0.tgz#d11a7a6bd1e084ec051d55104a9af8bccf54461f"
+  integrity sha512-zXeOUDS7+85i+RxLN+0iB6PMbGH7OhEgjETcD1fD8ZrhuhNFxYxYEHU41xuhkHIulJavcu3PKbPyuCrBxdxskQ==

 svg-pan-zoom@^3.6.1:
  version "3.6.1"