# adopt-styles Adopt/apply given styles to a `ShadowRoot` using constructable styleSheets if supported ```hbs preview-template
{{#if this.shadow}} {{#in-element this.shadow}} {{adopt-styles this.shadow (css ' :host { background-color: red; width: 100px; height: 100px; } ')}} {{/in-element}} {{/if}}
``` ## Positional Arguments | Argument | Type | Default | Description | | --- | --- | --- | --- | | `params` | `[ShadowRoot, (CSSResultGroup \| CSSResultGroup[])]` | | |