Steam Collection - Add/Remove All buttons

setTimeout(function(){
    // Create "Add" button
    var btn_add = document.createElement("BUTTON");
    var collection_window = document.querySelector('div.collectionAddItemsSection')
    collection_window.insertBefore(btn_add,collection_window.firstChild);
    btn_add.setAttribute('id','ASCM_addall');
    jQuery('button#ASCM_addall').html('+')
    btn_add.style.position = 'absolute';
    btn_add.style.top = '110px';
    btn_add.style.right = '50px';
    btn_add.style['border-radius'] = '10px';
    btn_add.style.color = 'white';
    btn_add.style['font-size'] = '40px';
    btn_add.style.background = '#00c417';
    btn_add.style.width = '60px';
    btn_add.style.height = '60px';
    btn_add.style['text-decoration'] = 'none';
    // Create "Remove" button
    var btn_rem = document.createElement("BUTTON");
    var collection_window = document.querySelector('div.collectionAddItemsSection')
    collection_window.insertBefore(btn_rem ,collection_window.firstChild);
    btn_rem .setAttribute('id','ASCM_removeall');
    jQuery('button#ASCM_removeall').html('-')
    btn_rem.style.position = 'absolute';
    btn_rem.style.top = '110px';
    btn_rem.style.right = '120px';
    btn_rem.style['border-radius'] = '10px';
    btn_rem.style.color = 'white';
    btn_rem.style['font-size'] = '40px';
    btn_rem.style.background = '#c20000';
    btn_rem.style.width = '60px';
    btn_rem.style.height = '60px';
    btn_rem.style['text-decoration'] = 'none';
    // Bind "Add" button
    jQuery('button#ASCM_addall').click(function(){
        var items = [];
        var collection_name = jQuery('div.manageCollectionHeader div.breadcrumbs a').eq(2).text().trim();
        var url = new URL(document.location.href);
        var collection_id = url.searchParams.get('id');
        jQuery('div#MySubscribedItems div.itemChoice:not(.inCollection)').each(function(){
            var data = {
                id: collection_id,
                sessionid: window.g_sessionID,
                childid: jQuery(this).attr('id').replace('choice_MySubscribedItems_',''),
                activeSection: collection_name
            };
            addToCollection(data, jQuery(this));
        });
    });
    // Bind "Remove" button
    jQuery('button#ASCM_removeall').click(function(){
        jQuery('div#MySubscribedItems div.itemChoice.inCollection').each(function(){
            window.RemoveChildFromCollection(jQuery(this).attr('id').replace('choice_MySubscribedItems_',''))
        });
    });
    // Function to send a request to add item to a collection
    function addToCollection(data, object){
        jQuery.ajax({
            type: "POST",
            url: 'https://steamcommunity.com/sharedfiles/addchild',
            data: data,
            success: function(response){
                if(object && response.success == 1){
                    object.addClass('inCollection');
                }
            }
        });
    }
}, 0);