import BaseComponent from "../Counter/BaseComponent";
declare class LineChart extends BaseComponent {
    private chartContainer;
    private chartInstance;
    private chartOptions;
    private sizeCheckInterval;
    private lastWidth;
    private lastHeight;
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    private initChart;
    private updateChart;
    /**
     * Continuously checks container's width and height.
     * If changed, call chart.resize().
     */
    private checkContainerSize;
    private getDefaultOptions;
    /**
     * Deep merge utility.
     * Tailored to your usage of merging ECharts config objects.
     */
    private mergeDeep;
}
export default LineChart;