The attributes property of an element is incredibly handy when you're looking to see what attributes are present without explicitly knowing which to look for; the attributes property provides an awesome level of dynamism. Until I found the need to grab every attribute from an element, I wasn't aware that such a list existed.

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I'm not too familiar with JS, so just three generic notes: It seems to me that the elements[i].attributes.length > 0 check is unnecessary because the statements inside the following for loop won't if elements[i].attributes.length is zero.. Consider creating local variables for elements[i] and elements[i].attributes.It would remove some duplication.

The attribute value can be any string. to access it, remove the data-at the beginnig of the attribute. You must also remove the hyphen. Then write the name camelCase. So data-user-name becomes userName. Access the data attribute with jQuery.

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#. If an attribute is required: true , then a value  required, specifies which attributes should be validated by this rule. string representing a JavaScript function whose return value determines whether to apply  An attribute to remove; as of version 1.7, it can be a space-separated list of attributes. The .removeAttr() method uses the JavaScript removeAttribute() function, but  In an HTML5 document, you can simply use the placeholder attribute (fig 4.01): can still make use of the required attribute in your JavaScript form validation. 7 Mar 2018 Instead the required attribute is applied to the wrapping . one is selected, remove the required attribute from the other checkboxes with js. You can test this in the above example by attempting to submit the form without selecting an option from the