Help with understand this js code

*can you tell me what this code do ?

import { MarkdownView, Plugin, WorkspaceLeaf } from 'obsidian';

export default class YoutubeTimestampPlugin extends Plugin {
  async onload() {
    this.registerMarkdownPostProcessor((el, ctx) => {
      el.querySelectorAll('a[href^="https://youtu.be/"]').forEach((link) => {
        const timestamp = link.getAttribute('data-timestamp');
        if (timestamp) {
          const url = new URL(link.getAttribute('href'));
          url.searchParams.set('t', timestamp);
          link.setAttribute('href', url.toString());
        }
      });
    });

    this.registerCodeMirror((cm: CodeMirror.Editor) => {
      cm.on('change', (instance, change) => {
        if (change.text.join('').match(/\[\[youtube-timestamp:.+\]\]/)) {
          const timestamp = change.text.join('').match(/(\d{1,2}:\d{2})/);
          const line = instance.getLine(change.from.line);
          const newText = line.replace(/\[\[youtube-timestamp:.+\]\]/, `https://youtu.be/xxxxxx?t=${timestamp}`);
          instance.replaceRange(newText, { line: change.from.line, ch: 0 }, { line: change.from.line, ch: line.length });
        }
      });
    });
  }
}

from chat gpt 4

make plugin in obsidian to make timestamp notes for youtube and should be works in live preview and readind mode something like “youtube timestamp” future in logseq ,now start work

As an AI language model, I can’t create the actual plugin for you, but I can guide you on how to create a plugin for Obsidian that adds YouTube timestamps to your notes. To create an Obsidian plugin, you’ll need some knowledge of JavaScript and the Obsidian API.

Here’s a step-by-step guide to get you started:

  1. Set up the development environment

First, you’ll need Node.js installed on your computer. You can download it from the official website: https://nodejs.org/

  1. Create a new plugin

Create a new folder for your plugin, and open a terminal in that folder. Run the following command to create a new Obsidian plugin:

npx create-obsidian-plugin

Follow the prompts to set up your plugin. You can name your plugin “obsidian-youtube-timestamps”.

  1. Edit the plugin source code

Open the newly created folder in a code editor like Visual Studio Code. The main file for your plugin is main.ts. This is where you’ll write the code for your plugin.

  1. Add the YouTube timestamp feature

To create a YouTube timestamp feature, you can use the following code snippet as a starting point:

import { MarkdownView, Plugin, WorkspaceLeaf } from 'obsidian';

export default class YoutubeTimestampPlugin extends Plugin {
  async onload() {
    this.registerMarkdownPostProcessor((el, ctx) => {
      el.querySelectorAll('a[href^="https://youtu.be/"]').forEach((link) => {
        const timestamp = link.getAttribute('data-timestamp');
        if (timestamp) {
          const url = new URL(link.getAttribute('href'));
          url.searchParams.set('t', timestamp);
          link.setAttribute('href', url.toString());
        }
      });
    });

    this.registerCodeMirror((cm: CodeMirror.Editor) => {
      cm.on('change', (instance, change) => {
        if (change.text.join('').match(/\[\[youtube-timestamp:.+\]\]/)) {
          const timestamp = change.text.join('').match(/(\d{1,2}:\d{2})/);
          const line = instance.getLine(change.from.line);
          const newText = line.replace(/\[\[youtube-timestamp:.+\]\]/, `https://youtu.be/xxxxxx?t=${timestamp}`);
          instance.replaceRange(newText, { line: change.from.line, ch: 0 }, { line: change.from.line, ch: line.length });
        }
      });
    });
  }
}

This code snippet does the following:

  • Registers a Markdown post-processor that looks for links starting with “https://youtu.be/” and adds a timestamp to the URL if available in the data-timestamp attribute.
  • Registers a CodeMirror event listener that listens for changes in the editor and replaces text like [[youtube-timestamp:1:23]] with a YouTube URL containing the timestamp.

Replace the contents of main.ts with the code snippet above.

  1. Build and install the plugin

In the terminal, navigate to the plugin folder and run the following commands:

npm install
npm run build

This will generate a main.js file in the dist folder. To install the plugin in Obsidian, copy the entire plugin folder to your vault’s plugins directory.

  1. Enable the plugin

Restart Obsidian and enable the “obsidian-youtube-timestamps” plugin in the settings. Now you can create YouTube timestamps in your notes by using the format [[youtube-timestamp:1:23]], and the plugin will automatically convert it into a link with the timestamp.

Please note that you will need to replace “xxxxxx” in the code snippet with the actual YouTube video ID when using the plugin.

Let me know if you need further assistance or clarification on any of the steps.

how to make plugin with this code in obsidian ?

Do not take hallucinated instructions from ChatGPT and then ask this community to make sense of them for you.

Please see the community code of conduct re: taking a “feed me” appoach to getting help.

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