Responsive Images

Library replaces all elements that have data-pb-picture attribute with <picture> tag.
Picture tag will include different sources (images) for different CSS breakpoints (screen sizes).
For instance, for the element:
<div data-pb-picture
    data-lg="optimise"
    data-lg-url="https://yoursite.com/doggy.png"
    data-md="resize?size=300"
    data-md-url="https://yoursite.com/doggy.png"
    data-sm="fit?size=100x100"
    data-sm-url="https://yoursite.com/doggy.png"/>
when you run picture() function from the library:
    window.Pixboost.picture({apiKey: 'API_KEY'})
then div will be replaced with <picture> tag:
<picture>
    <source srcset="https://pixboost.com/api/2/img/https://yoursite.com/doggy.png/optimise?auth=API_KEY" 
        media="(min-width: 990px)">
    <source srcset="https://pixboost.com/api/2/img/https://yoursite.com/doggy.png/resize?size=300&auth=API_KEY" 
        media="(min-width: 640px)">
    <img src="https://pixboost.com/api/2/img/https://yoursite.com/doggy.png/fit?size=100x100&auth=API_KEY">
</picture>
Operations
Operations (data-<BREAKPOINT> attribute):
optimise
resize
fit
asis
hide
You can specify operation arguments by adding them after operation name, e.g. fit?size=100x100
See more about operations here.
If you have the same source image for all operations then you can specify default URL:
<div data-pb-picture
    data-url="https://yoursite.com/doggy.png"
    data-lg="optimise"
    data-md="resize?size=300"
    data-sm="fit?size=100x100"/>
Alt text
You can specify alt text for responsive images using data-alt attribute:
<div data-pb-picture
    data-alt="doggy"
    data-url="https://yoursite.com/doggy.png"
    data-lg="optimise"
    data-md="resize?size=300"
    data-sm="fit?size=100x100"/>
Supporting Breakpoints
lg - Large devices (desktops, 990px and up)
@media (min-width: 990px)
md - Medium devices (tablets, 640px and up)
@media (min-width: 640px)
sm - Small devices - everything below tablets
Installation
Not responsive images
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