adoptStyleSheets method

void adoptStyleSheets(List<String> cssTexts)

Applies CSS strings as adopted stylesheets to this component's shadow root.

This uses the modern adoptedStyleSheets API which is more efficient than creating <style> elements because:

• Stylesheets can be shared across multiple shadow roots
• CSS is only parsed once and cached
• The browser can optimize stylesheet application

Note: This only works in the browser. On the server (during SSR), this is a no-op since styles should be rendered as <style> elements.

Example

@override
void onMount() {
  adoptStyleSheets([
    ':host { display: block; padding: 16px; }',
    'button { background: blue; color: white; }',
  ]);
}

Implementation

void adoptStyleSheets(List<String> cssTexts) {
  if (_shadowRoot == null) return;
  adopted_styles.setAdoptedStyleSheets(_shadowRoot!, cssTexts);
}