When creating a new Ractive instance, the
el option can be an element, a jQuery (or equivalent) collection, or a string.
If it's a string, it will first be treated as an ID. If there is no element on the page whose ID matches the string, Ractive will treat the string as a CSS selector and use
What do we mean by 'jQuery (or equivalent) collection'? A jQuery collection is the result of doing
$('#container'). It looks a lot like an array of elements:
var container, $container; container = document.getElementById( 'container' ); $container = $( '#container' ); alert( container === $container ); // alerts true
So Ractive isn't looking for any particular jQuery-ish property, it's just seeing if we've got an array-like object where the first member is an
Element. If so, it will take the first member (even if the collection contains many members).