1var attr = $(this).attr('name');
2
3// For some browsers, `attr` is undefined; for others,
4// `attr` is false.  Check for both.
5if (typeof attr !== typeof undefined && attr !== false) {
6    // ...
7}

1
2        
3            
4        
5     let result = element.hasAttribute(name);
6

1if ( $('html').attr('lang') == 'fr-FR' ) {
2    // do this
3} else {
4    // do that
5}