@spectrum-web-components/base (npm): The `SpectrumElement` base class as created by mixing `SpectrumMixin` onto `LitElement` adopts `dir` values from the `document` at connection time with a fallback to `lrt`. In a TypeScript context, it also enforces the presence of `this.shadowRoot` on ext
Keywords: spectrum css|web components|lit-element|lit-html|adobe|spectrum|webcomponents