Framework7 doesn't use any third party library, even for DOM manipulation. It has its own custom DOM7 - DOM library that utilizes most edge and high-performance methods for DOM manipulation. You don’t need to learn something new, its usage is very simple because it has the same syntax as well known jQuery library with support of the most popular and widely used methods and jQuery-like chaining.
To start use it there is a Dom7 global window function, but we recommend to assign it to some local variable with more handy name, like $$, but not to "$" to prevent conflicts with other libraries like jQuery or Zepto:
//Export DOM7 to local variable to make it easy accessable
var $$ = Dom7;
Usage Example
Just everything you already know:
$$('.something').on('click', function (e) {
$$(this).addClass('hello').attr('title', 'world').insertAfter('.something-else');
});