Add example for settings.

main.ts

@@ -1,9 +1,21 @@
 import { App, Modal, Notice, Plugin, PluginSettingTab, Setting } from 'obsidian';
 
+interface MyPluginSettings {
+	mySetting: string;
+}
+
+const DEFAULT_SETTINGS: MyPluginSettings = {
+	mySetting: 'default'
+}
+
 export default class MyPlugin extends Plugin {
-	onload() {
+	settings: MyPluginSettings;
+
+	async onload() {
 		console.log('loading plugin');
 
+		await this.loadSettings();
+
 		this.addRibbonIcon('dice', 'Sample Plugin', () => {
 			new Notice('This is a notice!');
 		});
@@ -30,9 +42,9 @@ export default class MyPlugin extends Plugin {
 
 		this.addSettingTab(new SampleSettingTab(this.app, this));
 
-		this.registerEvent(this.app.on('codemirror', (cm: CodeMirror.Editor) => {
+		this.registerCodeMirror((cm: CodeMirror.Editor) => {
 			console.log('codemirror', cm);
-		}));
+		});
 
 		this.registerDomEvent(document, 'click', (evt: MouseEvent) => {
 			console.log('click', evt);
@@ -44,6 +56,14 @@ export default class MyPlugin extends Plugin {
 	onunload() {
 		console.log('unloading plugin');
 	}
+
+	async loadSettings() {
+		this.settings = Object.assign(DEFAULT_SETTINGS, await this.loadData());
+	}
+
+	async saveSettings() {
+		await this.saveData(this.settings);
+	}
 }
 
 class SampleModal extends Modal {
@@ -63,6 +83,13 @@ class SampleModal extends Modal {
 }
 
 class SampleSettingTab extends PluginSettingTab {
+	plugin: MyPlugin;
+
+	constructor(app: App, plugin: MyPlugin) {
+		super(app, plugin);
+		this.plugin = plugin;
+	}
+
 	display(): void {
 		let {containerEl} = this;
 
@@ -73,11 +100,13 @@ class SampleSettingTab extends PluginSettingTab {
 		new Setting(containerEl)
 			.setName('Setting #1')
 			.setDesc('It\'s a secret')
-			.addText(text => text.setPlaceholder('Enter your secret')
+			.addText(text => text
+				.setPlaceholder('Enter your secret')
 				.setValue('')
-				.onChange((value) => {
+				.onChange(async (value) => {
 					console.log('Secret: ' + value);
+					this.plugin.settings.mySetting = value;
+					await this.plugin.saveSettings();
 				}));
-
 	}
 }