dd_xcx/node_modules/@antv/util/esm/get.js

import isString from './is-string';
/**
 * https://github.com/developit/dlv/blob/master/index.js
 * @param obj
 * @param key
 * @param defaultValue
 */
export default (function (obj, key, defaultValue) {
    var p = 0;
    var keyArr = isString(key) ? key.split('.') : key;
    while (obj && p < keyArr.length) {
        obj = obj[keyArr[p++]];
    }
    return (obj === undefined || p < keyArr.length) ? defaultValue : obj;
});
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