markdown-it-imsize
A markdown-it plugin for size-specified image markups. This plugin overloads original image renderer of markdown-it.
Usage
Enable plugin
var md = require('markdown-it')({
html: true,
linkify: true,
typography: true
}).use(require('markdown-it-imsize')); // <-- this use(package_name) is required
Example

is interpreted as
<p><img src="image.png" width="100" height="200"></p>
Options
Auto fill
var md = require('markdown-it')({
html: true,
linkify: true,
typography: true
}).use(require('markdown-it-imsize'), { autofill: true });
will fill the width and height fields automatically if the specified image path is valid.