html-img package 
Fill image size automatically.

- Supports HTML, Jade, EJS, ECO, ERB and PHP
- Supports png, jpg and gif
- Supports absolute url: Like
/images/sample.png(requiresdocument_rootproperty in project.json) - Supports relative url: Like
images/smaple.png - Supports protocol-absolute url: Like
http://example.com/images/sample.png - Supports protocol-relative url: Like
//example.com/images/sample.png(requiresprotocolproperty in project.json) - Fills only width, height or both
- Fills as full or half size
- Overwrites wrong size
Keymap
ctrl-iorctrl-i enter: Fill width and heightctrl-i /: Fill width and height as halfctrl-alt-iorctrl-alt-i enter: Fill widthctrl-alt-i /: Fill width as halfctrl-shift-iorctrl-shift-i enter: Fill heightctrl-shift-i /: Fill height as half
Override keymap with Atom > Open Your Keymap.
Configuration
When you specify src absolute or protocol-relative url, you can create project.json at the project root.
project.json
document_root: Used for resolving absolute url. Default is''.protocol: Used for resolving protocol-relative url. Default is'http'.
Example
.
├──public # Document root
│ └──index.html # Files
└──project.json # Configuration for html-img
{
"document_root": "public",
"protocol": "https"
}