Shopify Theme Development Part 1 – Setup, Code & Version Control| Sabbirz

Create a folder with your project name and open it in VS Code or any other editor.
Create the following folders:
- assets (for CSS, JavaScript, and images)
- config (for global theme settings)
- layout (for the main theme layout file)
- locales (for translations)
- sections (for modular, reusable page sections)
- snippets (for smaller, reusable code snippets)
- templates (for page and section JSON templates)
The most crucial file in any theme is theme.liquid, which lives inside the layout folder. This file acts as the master template for your entire store; every other template is rendered inside of it.

Create layout/theme.liquid and paste this essential boilerplate code:
```
<!DOCTYPE html>
<html>
  <head>
    <title>{{ page_title }}</title>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />

    {{ content_for_header }}
  </head>

  <body id="main" role="main">
    {{ content_for_layout }}
  </body>
</html>
```
Key elements to note:
- {{ content_for_header }}: This Liquid object is mandatory. It must be inside the <head> tag. Shopify uses it to inject critical assets, like scripts for analytics and apps.
- {{ content_for_layout }}: This is where Shopify will render the content of your other templates (e.g., index.json, product.json). It must be inside the <body> tag.

Create index.json inside the templates folder and paste the minimum required code below.

Note: This file will be generated automatically by Shopify later.

{
  "sections": {
    "banner": {
      "type": "banner",
      "settings": {
        "banner_text": "Hello"
      }
    }
  },
  "order": ["banner"]
}

Create banner.liquid in the sections folder as referenced earlier.

<section>
    {% comment %} Banner Section {% endcomment %}
    <h1>Hello World! Hola</h1>
</section>

{% schema %}
{
    "name": "Banner",
    "settings": [
        {
            "type": "text",
            "id": "banner_text",
            "label": "Banner Text"
        }
    ],
    "presets": [
        {
            "name": "Banner"
        }
    ]
}
{% endschema %}

Create a settings_schema.json file inside the config directory.

[
  {
    "name": "Theme settings",
    "settings": [
      {
        "type": "color",
        "id": "background_color",
        "label": "Background color",
        "default": "#ffffff"
      }
    ]
  },
  {
    "name": "Default",
    "settings": [
      {
        "type": "color",
        "id": "default_color",
        "label": "Default color",
        "default": "#ffffff"
      }
    ]
  }
]

Push the code to GitHub, ensuring the branch name is main.
In Shopify, go to Online Store → Themes.

Click Add Theme, then select Connect from GitHub.

Choose your repository. Make sure the branch selected is main.
Visit your online store and you’ll see the default Hello World banner.

Congratulations! 🎉
Let’s customize the theme now.

Customize Theme

In the theme customizer, you should see an editable Banner text field. Try entering some text.
Check your GitHub repo — you’ll notice Shopify has made a commit.

Inspect the commit and you’ll see that the index.json in templates has been updated with your new banner text.
Pull the latest changes from GitHub. You can use GitHub Desktop or VS Code terminal.
Update your banner.liquid file to render the dynamic text:
```
{{ section.settings.banner_text }}
```
Push the changes back to GitHub and refresh your online store. You’ll now see the updated banner in real-time.
You can add another Banner section as well and update its text.

Don’t forget to inspect GitHub again to understand how Shopify auto-commits content changes.