JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.621/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.621/styles/kendo.default.min.css">
<script src="http://cdn.kendostatic.com/2012.2.621/js/kendo.all.min.js"></script>
<div id="landenlist"></div>
<button class="add-land"></button>

JavaScript

var dslanden = new kendo.data.DataSource({
    transport: {
        read: {
            url: "/Api/InstrumentLand"
        },
        destroy: {
            url: "/Api/InstrumentLand",
            dataType: "json",
            type: "DELETE"
        },
        create: {
            url: "/Api/InstrumentLand",
            dataType: "json",
            type: "POST"
        },
        update: {
            url: "/Api/InstrumentLand",
            dataType: "json",
            type: "PUT"
        }
    },
    batch: false,
    schema: {
        model: {
            id: "LandId",
            fields: {
                LandId: {
                    validation: {
                        required: true
                    }
                },
                InstrumentId: {
                    validation: {
                        required: true
                    }
                },
                Code: {
                    validation: {
                        required: true
                    }
                },
                Naam: {
                    validation: {
                        required: true
                    }
                }
            }
        }
    }
});

$("#landenlist").kendoGrid({
    editable: "inline",
    columns: [
        {
        field: "InstrumentId"},
    {
        field: "LandId"},
    {
        field: "Code"},
    {
        field: "Naam"},
    {
        command: [{
            name: "destroy",
            text: "Delete"}]}
    ],
    dataSource: dslanden
});

$(".add-land").click(function() {
    dslanden.add({
        InstrumentId: 5,
        LandId: 3,
        Code: "DE",
        Naam: "Duitsland"
    });
    //dslanden.sync();
});