import 'echarts/theme/dark';
import 'echarts/theme/infographic';
import 'echarts/theme/macarons';
import 'echarts/theme/roma';
import 'echarts/theme/shine';
import 'echarts/theme/vintage';
export default interface Item {
    name: string | undefined;
    value: string;
}
export default class Pie extends HTMLElement {
    private dom;
    private my_chart;
    private initialized;
    constructor();
    get_data_url(): string;
    connectedCallback(): void;
    disconnectedCallback(): void;
    static readonly observedAttributes: string[];
    attributeChangedCallback(_attrName: string, oldVal: string, newVal: string): void;
    private refresh;
    private destroy;
}