代码解析

// 代码已删除dev环境判断代码
export function init(
    dom: HTMLElement,
    theme?: string | object,
    opts?: EChartsInitOpts
): EChartsType {
    const isClient = !(opts && opts.ssr);
    if (isClient) {
        const existInstance = getInstanceByDom(dom);
        if (existInstance) {
            return existInstance;
        }
    }
    const chart = new ECharts(dom, theme, opts);
    chart.id = 'ec_' + idBase++;
    instances[chart.id] = chart;

    isClient && modelUtil.setAttribute(dom, DOM_ATTRIBUTE_KEY, chart.id);

    enableConnect(chart);

    lifecycle.trigger('afterinit', chart);

    return chart;
}

思维导图

点击查看【processon】