javascript - 如何添加带有接受属性的回调函数的事件监听器？

Question

还有，那怎么删除呢？

Answer 1

// we're in some internal scope here
var x = 10;
var fn = function( e ) {
    wrappedFunction( e, x );
}

//add
o.addEventListener( 'click', fn, false );

// create remover
var remover = function() {
    o.removeEventListener( 'click', fn, false );
}


//save the remover for later or return it - when it's called from whatever scope the event is removed
remover();