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- /**
- * Check if argument is a HTML element.
- *
- * @param {Object} value
- * @return {Boolean}
- */
- exports.node = function(value) {
- return value !== undefined
- && value instanceof HTMLElement
- && value.nodeType === 1;
- };
- /**
- * Check if argument is a list of HTML elements.
- *
- * @param {Object} value
- * @return {Boolean}
- */
- exports.nodeList = function(value) {
- var type = Object.prototype.toString.call(value);
- return value !== undefined
- && (type === '[object NodeList]' || type === '[object HTMLCollection]')
- && ('length' in value)
- && (value.length === 0 || exports.node(value[0]));
- };
- /**
- * Check if argument is a string.
- *
- * @param {Object} value
- * @return {Boolean}
- */
- exports.string = function(value) {
- return typeof value === 'string'
- || value instanceof String;
- };
- /**
- * Check if argument is a function.
- *
- * @param {Object} value
- * @return {Boolean}
- */
- exports.fn = function(value) {
- var type = Object.prototype.toString.call(value);
- return type === '[object Function]';
- };
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