ACF Toggle Collapse in Repeater Field

toggle-collapse.js

var imagesToggleCollapse = {
    init: function(){
        var _ = this;

        _.grabDOM();
        _.addButton();
        _.bindEvents();
    },

    grabDOM: function(){
        var _ = this;

        // The tab that holds the images
        _.$tab = $('div.acf-field-5761048e1ce83');
    },

    addButton: function() {
        var _ = this;

        $('<button class="button toggle-collapse" style="margin:20px">Toggle Collapse</button>').appendTo( _.$tab.find('label').eq(0) );
    },

    bindEvents: function() {
        var _ = this;

        $('body').on('click', '.toggle-collapse', function(){
            $( ".-collapse" ).each(function( index ) {
                $( this ).click();
            });
        });

    }
};