nl_tokens: to test if a HTML element
pl_tokens: function isElement ( obj ) { <mask> ! ! ( ( typeof HTMLElement === 'undefined' ? 'undefined' : _typeof ( HTMLElement ) ) === 'object' ? obj instanceof HTMLElement : obj && ( typeof obj === 'undefined' ? 'undefined' : _typeof ( obj ) ) === 'object' && obj !== null && obj . nodeType === 1 && typeof obj . nodeName === 'string' ) ; }