markdown-it-implicit-figures 
Render images occurring by itself in a paragraph as <figure><img ...></figure>, similar to pandoc's implicit figures.
Example input:
text with 
works with links too:
[](page.html)
Output:
<p>text with <img src="img.png" alt=""></p>
<figure><img src="fig.png" alt=""></figure>
<p>works with links too:</p>
<figure><a href="page.html"><img src="fig.png" alt=""></a></figure>
Install
$ npm install --save markdown-it-implicit-figures
Usage
var md = require('markdown-it')();
var implicitFigures = require('markdown-it-implicit-figures');
md.use(implicitFigures, {
dataType: false, // <figure data-type="image">, default: false
figcaption: false, // <figcaption>alternative text</figcaption>, default: false
keepAlt: false // <img alt="alt text" .../><figcaption>alt text</figcaption>, default: false
lazyLoading: false, // <img loading="lazy" ...>, default: false
link: false // <a href="img.png"><img src="img.png"></a>, default: false
tabindex: false, // <figure tabindex="1+n">..., default: false
});
var src = 'text with \n\n\n\nanother paragraph';
var res = md.render(src);
console.log(res);
demo as jsfiddle
Options
-
dataType: Set dataType to true to declare the data-type being wrapped,
e.g.: <figure data-type="image">. This can be useful for applying special
styling for different kind of figures.
-
figcaption: Set figcaption to true or alt to put the alternative text
in a <figcaption>-block after the image. E.g.:  renders to
<figure>
<img src="img.png" alt="">
<figcaption>text</figcaption>
</figure>
-
keepAlt: Set keepAlt to true to prevent it from being cleared when turned
into a figcaption, E.g.:  renders to
<figure>
<img src="img.png" alt="text">
<figcaption>text</figcaption>
</figure>
-
tabindex: Set tabindex to true to add a tabindex property to each
figure, beginning at tabindex="1" and incrementing for each figure
encountered. Could be used with this css-trick,
which expands figures upon mouse-over.
-
lazyLoading: Set lazyLoading to true to add loading="lazy" to image element.
-
link: Put a link around the image if there is none yet.
-
copyAttrs: Copy attributes matching (RegExp or string) copyAttrs to figure element.
License
MIT © Arve Seljebu
