css

Optional. The name of a CSS class(es) applied to a cell of Layout

css?: string;

Example

<style>
    .layout-header {
        --dhx-background-primary: #3A434A;
    }
    .dhx_layout-cell-inner_html {
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
</style>

<script>
    const layout = new dhx.Layout("layout_container", {
        rows: [
            {
                id: "toolbar",
                html: "Header",
                css: "layout-header",
                height: "60px"
            },
            // more objects
        ]
    });
</script>

Related sample: Layout. Styling (custom CSS)

Note, that the DHTMLX library provides a set of own CSS classes that you can also apply to change the appearance of a Layout cell.

const layout = new dhx.Layout("layout_container", {
    css: "dhx_layout-cell--bordered",
    rows: [
        {
            id: "toolbar",
            html: "Header",
            css: "dhx_layout-cell--border_bottom layout-header",
            gravity: false,
            height: "60px"
        }
    ]
});