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matchNode.js
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matchNode.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const hasOwn =
Object.prototype.hasOwnProperty.call.bind(Object.prototype.hasOwnProperty);
/**
* Checks whether needle is a strict subset of haystack.
*
* @param {*} haystack Value to test.
* @param {*} needle Test function or value to look for in `haystack`.
* @return {bool}
*/
function matchNode(haystack, needle) {
if (typeof needle === 'function') {
return needle(haystack);
}
if (isNode(needle) && isNode(haystack)) {
return Object.keys(needle).every(function(property) {
return (
hasOwn(haystack, property) &&
matchNode(haystack[property], needle[property])
);
});
}
return haystack === needle;
}
function isNode(value) {
return typeof value === 'object' && value;
}
module.exports = matchNode;