How to extend a block inside theme

You can extend the view.php, style.php and block.css file of any block inside a theme. To do this you need to create a folder named after the blocks slug that you want to edit, inside a theme.

###Example:

.
├── wp-content/plugins/tx-onepagger
|   ├── blocks
|   |   ├── blogs
|   |   |   ├── blog-1
|   |   |   |   ├── config.php
|   |   |   |   ├── view.php
|   |   |   |   ├── style.php
|   |   |   |   ├── block.css
|   |   |   |   ├── block.jpg

Lets extend the blog-1 block. Find the Onepager default blocks folder. Open the config.php file and find the slug.

return array(
  'slug' => 'blog-1',

  ...

Create blog-1 folder inside themes blocks folder your-theme/onepager/overrides/blog-1

.
├── wp-content/themes/themename
|   ├── onepager
|   |   ├── overrides
|   |   |   ├── blog-1
|   |   |   |   ├── view.php
|   |   |   |   ├── style.php
|   |   |   |   ├── block.css

Copy the view.php ,style.php and block.css file inside blog-1 folder. Now you can edit them up to your needs. view.php and style.php files have access to these variables. You can keep all 3 of the files or one of them.

###$id

different for every section that implements a block

example:

<section id="<?php echo $id?>">
  ....
</section>

###$url

url of the block folder

example:

<section id="<?php echo $id?>">
  <img src="<?php echo $url?>/assets/block-image.png"/>
</section>

###$content, $settings, $styles

example:

<section id="<?php echo $id?>">
  <img src="<?php echo $content['logo']?>"/>
</section>