coze_demo/socket/node_modules/pillarjs/docs/6_SHADOW_DOM.md

Shadow DOM

By default Pillar components don't use Shadow DOM because polyfill for it in some browsers may be a bit expensive. If you know what you doing and want to use Shadow DOM, all you need to do is pass an options object with useShadow when registering:

Pillar.register(MyComponent, 'my-component', {
	useShadow: 'open',
});

Modes

• useShadow: 'open' will enable Shadow DOM that is accessible from outside JavaScript.
• useShadow: 'closed' will enable Shadow DOM that is unaccessible and unchangeable from JavaScript. As such, these elements can't be controlled using Pillar DevTools.

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