mutation.js
function mutation(target, handler) {
    target.addEventListener("mutation", function(evt) {
        handler.call(this, this, evt.mutations);
    });
}
function mutation(target, handler) {
    target.addEventListener("mutation", function(evt) {
        handler.call(this, this, evt.mutations);
    });
}
function mutation ( target , handler ) { target . addEventListener ( "mutation" , function ( evt ) { handler . call ( this , this , evt . mutations ) ; } ) ; }
Attach mutation event handler.
@param {EventTarget} target
@param {function} handler
Attach mutation event handler .