get.js
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import { RX_ARRAY_NOTATION } from '../constants/regex';
import { identity } from './identity';
import { isArray, isNull, isObject, isUndefinedOrNull } from './inspect';
/**
* Get property defined by dot/array notation in string, returns undefined if not found
*
* @link https://gist.github.com/jeneg/9767afdcca45601ea44930ea03e0febf#gistcomment-1935901
*
* @param {Object} obj
* @param {string|Array} path
* @return {*}
*/
export var getRaw = function getRaw(obj, path) {
var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : undefined;
// 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
// 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 && !isUndefinedOrNull(obj = obj[step]);
}) ? obj : isNull(obj) ? null : defaultValue;
};
/**
* 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 {*}
*/
export var get = function get(obj, path) {
var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
var value = getRaw(obj, path);
return isUndefinedOrNull(value) ? defaultValue : value;
};