jQuery doesn't provide a method similar to hasAttribute() to determine whether a given attribute exists in the DOM. However, we can use the attr() method for this task. In fact, this method returns a boolean value when used with conditional statements.
We can create the hasAttr() method:
(function($) {
$.fn.hasAttr = function(attr) {
attr = attr || 'class';
var that = this;
if(!that.attr(attr)) {
return false;
}
return true;
};
})(jQuery);
In this case, as for attr(), we should not return this. An example:
<p id="one">Test</p> <p>Test</p> <p title="two">Test</p>
We can run the following test:
$(function() {
$('p').each(function() {
var $p = $(this);
console.log($p.hasAttr('id'));
console.log($p.hasAttr('title'));
});
});
which outputs the following:
true false false false false true