mirror of
https://github.com/whoisclebs/lodash.git
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84 lines
2.1 KiB
JavaScript
84 lines
2.1 KiB
JavaScript
/**
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* lodash 3.0.2 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var isPlainObject = require('lodash.isplainobject');
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/**
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* Checks if `value` is object-like.
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*
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* @private
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
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*/
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function isObjectLike(value) {
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return (value && typeof value == 'object') || false;
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}
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/** Used for native method references. */
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var objectProto = Object.prototype;
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/** Used to detect DOM support. */
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var document = (document = global.window) && document.document;
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/**
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* Used to resolve the `toStringTag` of values.
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* See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring)
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* for more details.
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*/
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var objToString = objectProto.toString;
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/**
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* An object environment feature flags.
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*
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* @static
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* @memberOf _
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* @type Object
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*/
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var support = {};
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/**
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* Detect if the DOM is supported.
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*
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* @memberOf _.support
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* @type boolean
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*/
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try {
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support.dom = document.createDocumentFragment().nodeType === 11;
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} catch(e) {
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support.dom = false;
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}
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/**
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* Checks if `value` is a DOM element.
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
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* @example
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*
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* _.isElement(document.body);
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* // => true
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*
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* _.isElement('<body>');
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* // => false
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*/
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function isElement(value) {
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return (value && value.nodeType === 1 && isObjectLike(value) &&
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objToString.call(value).indexOf('Element') > -1) || false;
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}
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// Fallback for environments without DOM support.
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if (!support.dom) {
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isElement = function(value) {
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return (value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value)) || false;
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};
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}
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module.exports = isElement;
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