How to get inner text in React virtual DOM

ReactJS-InnerText.js

$(function() {
	React.getInnerText = function(obj) {
		var buf = '';
		if( obj ) {
			var type = typeof(obj);
			if( type === 'string' || type === 'number' ) {
				buf += obj;
			} else if( type === 'object' ) {
				var children = null;
				if( Array.isArray(obj) ) {
					children = obj;
				} else {
					var props = obj.props;
					if( props ) {
						children = props.children;
					}
				}
				if( children ) {
					if( Array.isArray(children) ) {
						children.forEach(function(o) {
							buf += React.getInnerText(o);
						});
					} else {
						buf += React.getInnerText(children);
					}
				}
			}
		}
		return buf;
	};
});