css

adds a CSS class(es) to the component

css?: string;

Example

<style>
    .bg-gray {
        background: #efefef;
    }
</style>

const tree = new dhx.Tree("tree_container", {css: "bg-gray"});

Related samples:

• Tree. Styling (custom CSS)
• Tree. Custom toggle icon

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

const tree = new dhx.Tree("tree_container", {
    css: "dhx_widget--bg-gray"
});