This is a box1 and... I don't know. Welcome fork at Github.
bootstrap.footnotes.js no bootstrap2!
<span class="sup" data-text="This's text.">Text</span>
<sup class="sup" data-text="The sup.">1<sup>
<span class="sup" data-sur="The sur.">Right<span>
<span class="sup" data-sul="The sul.">Left<span>
<span class="sup" data-sub="The sub.">Bottom<span>
<span class="sup" data-img="url">Text</span>
I like blue, purple and grass green.
<span class="sup" data-color="#7eccfa">blue</span>
<span class="sup" data-color="rgba(140, 111, 216, 1.000)">purple</span>
<span class="sup" data-color="hsla(83, 74%, 51%, 1.000)">grass green</span>