Hi,

Define a method in your JavaScript file: odoo.define('your_module_name.your_js_file', function (require) {

    "use strict";

    var core = require('web.core');

    var Widget = require('web.Widget');

    var _t = core._t;

    var YourWidget = Widget.extend({

        template: 'YourTemplate',

        events: {

            'click .list-item': '_onListItemClick',

        },

        _onListItemClick: function (ev) {

            var recordID = $(ev.currentTarget).data('record-id');

            this.do_action({

                name: _t("Open Record"),

                type: 'ir.actions.act_window',

                res_model: 'your.model.name',

                res_id: recordID,

                views: [[false, 'form']],

                target: 'current',

            });

        },

    });

    return YourWidget;

});

Pass Record ID from the template:<t t-name="YourTemplate">
<div class="list-item" t-att-data-record-id="record.id">
        <!-- Your list item content here -->
    </div>
</t>

Hope it helps