zh/builder/src/echarts3/ExtensionAPI.js

import * as zrUtil from 'zrender/src/core/util';
var echartsAPIList = ['getDom', 'getZr', 'getWidth', 'getHeight', 'getDevicePixelRatio', 'dispatchAction', 'isDisposed', 'on', 'off', 'getDataURL', 'getConnectedDataURL', 'getModel', 'getOption', 'getViewOfComponentModel', 'getViewOfSeriesModel']; // And `getCoordinateSystems` and `getComponentByElement` will be injected in echarts.js

function ExtensionAPI(chartInstance) {
  zrUtil.each(echartsAPIList, function (name) {
    this[name] = zrUtil.bind(chartInstance[name], chartInstance);
  }, this);
}

export default ExtensionAPI;