import identity from './identity'; import { isArray, isObject } from './inspect'; var RX_ARRAY_NOTATION = /\[(\d+)]/g; /** * Get property defined by dot/array notation in string. * * @link https://gist.github.com/jeneg/9767afdcca45601ea44930ea03e0febf#gistcomment-1935901 * * @param {Object} obj * @param {string|Array} path * @param {*} defaultValue (optional) * @return {*} */ var get = function get(obj, path) { var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null; // Handle array of path values path = isArray(path) ? path.join('.') : path; // If no path or no object passed if (!path || !isObject(obj)) { return defaultValue; } // Handle edge case where user has dot(s) in top-level item field key // See https://github.com/bootstrap-vue/bootstrap-vue/issues/2762 // Switched to `in` operator vs `hasOwnProperty` to handle obj.prototype getters // https://github.com/bootstrap-vue/bootstrap-vue/issues/3463 if (path in obj) { return obj[path]; } // Handle string array notation (numeric indices only) path = String(path).replace(RX_ARRAY_NOTATION, '.$1'); var steps = path.split('.').filter(identity); // Handle case where someone passes a string of only dots if (steps.length === 0) { return defaultValue; } // Traverse path in object to find result // We use `!=` vs `!==` to test for both `null` and `undefined` // Switched to `in` operator vs `hasOwnProperty` to handle obj.prototype getters // https://github.com/bootstrap-vue/bootstrap-vue/issues/3463 return steps.every(function (step) { return isObject(obj) && step in obj && (obj = obj[step]) != null; }) ? obj : defaultValue; }; export default get;