todo-tracker-obsidian/src/main.ts

import {App, Editor, MarkdownView, Modal, moment, Notice, Plugin} from 'obsidian';
import {DEFAULT_SETTINGS, MyPluginSettings, SampleSettingTab} from "./settings";
import {readFile} from "fs/promises";

// Remember to rename these classes and interfaces!

export default class MyPlugin extends Plugin {
	settings: MyPluginSettings;

	async onload() {
		await this.loadSettings();

		// This creates an icon in the left ribbon.
		this.addRibbonIcon('dice', 'Sample', (evt: MouseEvent) => {
			// Called when the user clicks the icon.
			new Notice('This is a Notice!');
			const content = readFile('test');
			this.app.workspace.activeLeaf?.detach();
			const el = document.createDiv();
			el.style.color = 'white';
			el.style.backgroundColor = 'red';
		});

		// This adds a status bar item to the bottom of the app. Does not work on mobile apps.
		const statusBarItemEl = this.addStatusBarItem();
		statusBarItemEl.innerHTML = "Hello world";
		statusBarItemEl.innerHTML = "<span>" + this.settings.mySetting + "</span>"
		statusBarItemEl.setText('Status bar text');

		// This adds a simple command that can be triggered anywhere
		this.addCommand({
			id: 'open-sample-plugin-modal-simple',
			name: 'Open sample plugin modal (simple)',
			callback: () => {
				new SampleModal(this.app).open();
			}
		});
		// This adds an editor command that can perform some operation on the current editor instance
		this.addCommand({
			id: 'sample-editor-command',
			name: 'Sample plugin editor command',
			editorCallback: (editor: Editor, view: MarkdownView) => {
				editor.replaceSelection('Sample editor command');
			}
		});
		// This adds a complex command that can check whether the current state of the app allows execution of the command
		this.addCommand({
			id: 'open-sample-modal-complex',
			name: 'Open sample modal (complex)',
			hotkeys: [{modifiers: ['Mod'], key: 'a'}],
			checkCallback: (checking: boolean) => {
				// Conditions to check
				const markdownView = this.app.workspace.getActiveViewOfType(MarkdownView);
				if (markdownView) {
					// If checking is true, we're simply "checking" if the command can be run.
					// If checking is false, then we want to actually perform the operation.
					if (!checking) {
						new SampleModal(this.app).open();
					}

					// This command will only show up in Command Palette when the check function returns true
					return true;
				}
				return false;
			}
		});

		// This adds a settings tab so the user can configure various aspects of the plugin
		this.addSettingTab(new SampleSettingTab(this.app, this));

		// If the plugin hooks up any global DOM events (on parts of the app that doesn't belong to this plugin)
		// Using this function will automatically remove the event listener when this plugin is disabled.
		this.registerDomEvent(document, 'click', (evt: MouseEvent) => {
			new Notice("click");
			"test".replace(/(?<=([ab]+)([bc]+))$/, "test");
		});

		// When registering intervals, this function will automatically clear the interval when the plugin is disabled.
		this.registerInterval(window.setInterval(() => console.log('setInterval'), 5 * 60 * 1000));

		moment().format('YYYY-MM-DD HH:mm:ss');
	}

	onunload() {
		const {workspace} = this.app;
		workspace.detachLeavesOfType('test');
	}

	async loadSettings() {
		this.settings = Object.assign({}, DEFAULT_SETTINGS, await this.loadData());
		this.settings = Object.assign(DEFAULT_SETTINGS, await this.loadData());
	}

	async saveSettings() {
		await this.saveData(this.settings);
	}
}

class SampleModal extends Modal {
	constructor(app: App) {
		super(app);
	}

	onOpen() {
		let {contentEl} = this;
		contentEl.setText('Woah!');
	}

	onClose() {
		var {contentEl} = this;
		contentEl.empty();
	}
}