phaser/examples/groups/remove.js

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, render: render });

var items;

function preload() {

    game.load.spritesheet('item', 'assets/buttons/number-buttons-90x90.png', 90, 90);
    game.load.image('rect', 'assets/tests/200x100corners.png');
}

function create() {

    // Create item container group.
    items = game.add.group();

    // Add some items and add them to the container group,
    // then you can drag and drop them to remove.
    var item;

    for (var i = 0; i < 6; i++)
    {
        // Directly create sprites from the group.
        item = items.create(90, 90 * i, 'item', i);
        // Enable input detection, then it's possible be dragged.
        item.inputEnabled = true;
        // Make this item draggable.
        item.input.enableDrag();
        // Then we make it snap to 90x90 grids.
        item.input.enableSnap(90, 90, false, true);
        // Add a handler to remove it using different options when dropped.
        item.events.onDragStop.add(dropHandler);
    }

    // Create a rectangle drop it at this rectangle to
    // remove it from origin group normally or
    // cut it from the group's array entirely.
    var rect = game.add.sprite(390, 0, 'rect');
    rect.scale.setTo(2.0, 3.0);

}

function render() {

    game.debug.text('Size of group: ' + items.length, 100, 560);
    game.debug.text('Drop here to cut items from groups entirely.', 390, 24);
    
}

function dropHandler(item, pointer) {

    if (item.x < 90)
    {
        item.x = 90;
    }
    else if (item.x > 400)
    {
        // So it is dropped in one rectangle.
        // Remove it from group normally, so the group's size does not change.
        items.remove(item);
        console.log("Group length : "+items.length);
    }

}