Messing with magento custom theme, overriding magento theme.

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Before diving into theme customization we need to have an quick overview of magento 2 directory structure.




Magento 2.x directory structure.
As mentioned my earlier post magento 2 directory structure differ from magento 1, so it is important to have a clear knowledge about directory of magento 2.


The root magento 2 project directory looks like the screen shot attached above. All you need to know about the app folder because other folders contains pre-defined core files which we will not modifying in order to customized our theme or module.

Pre existing theme file resides under path

<magento_root>vendor/magento/module-theme/view/frontend/


Magento came with two default theme Luma and Blank, you can override any one to create custom theme as per your choice.


Overriding Luma Theme

Now i am going to override Luma theme, you need to create these two mandatory file along with one optional file as follows.

  1. To overriding  your custom theme go to folder app/design/frontend and make a new folder with your vender name Trieffects (vendor name) and then first (theme name)
  2. So your directory structure would be app/design/frontend/Trieffects/first
  3. Create a file name theme.xml inside your theme directory and add the following code
    app/design/frontend/Trieffects/first/theme.xml
  4. Create a file name registration.php inside your theme directory
  5. Create a componser.json file and add the following code
  6. At this stage, and empty theme should have been installed which can be seen in magento admin.
    Stores -> General -> Design -> Design Theme
    Your theme should be visible here




File's Content.

theme.xml

<theme xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Config/etc/theme.xsd">
<title>Trieffects First</title> <!-- your theme's name -->
<parent>Magento/luma</parent> <!-- the parent theme, in case your theme inherits from an existing theme -->
<!-- <media>
<preview_image>media/preview.jpg</preview_image>
</media> --> <!-- Here you can put a preview image of your theme. If you don't have a preview image comment it else it gives an error -->
</theme>


registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::THEME,
'frontend/Trieffects/first',
__DIR__
);


composer.json (optional)

{
   "name": "excellence/first",
   "description": "N/A",
   "require": {
   "php": "~5.5.0|~5.6.0|~7.0.0",
   magento/theme-frontend-blank": "100.0.*",
   "magento/framework": "100.0.*"
    },
    "type": "magento2-theme",
    "version": "100.0.1",
   "license": [
   "OSL-3.0",
   "AFL-3.0"
   ],
   "autoload": {
   "files": [
   "registration.php"
   ]
  }
}

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