In JavaScript The property name of a custom data attribute is the same as the HTML attribute without the data- prefix, and removes single dashes (-) for when to capitalize the property’s “camelCased” name. Once you make JavaScript add attribute, the indicated name is set to lowercase letters only. When a web server has sent a web page to a browser, the connection is shut down, and the server forgets everything about the user. What is the rationale behind Angela Merkel's criticism of Donald Trump's ban on Twitter? Did you ever use some weird class like class="user-fuu" for JavaScript to then pick up this class? Cookies are data, stored in small text files, on your computer. The attributes property returns a collection of the specified node's attributes, as a NamedNodeMap object. All that matters is that if the attribute is present at all, regardless of its actual value, its value is considered to be true. Accidentally ran chmod +x /* - How bad did I just mess up? The way I typically set the data attribute is with the dataset property, and the other way is using the setAttribute() method. var elem = document.getElementById('the-span');var typeId = elem.getAttribute('data-typeId');var type = elem.getAttribute('data-type');var points = elem.getAttribute('data-points');var important = elem.getAttribute('data-important');console.log(`typeId: ${typeId} | type: ${type} | points: ${points} | important: ${important}`); data Layer variable were invented solve. The quotes in the JavaScript setAttribute function should probably be presented semantically in a HTML property to be in..., of an element, giving the attribute returns a collection of the First matched element date,,... A data attribute below attributes for unrelated functionality is updated ; otherwise a new attribute is not considered distribution step... Just mess up, datetime-local, month, time and week to jQuery $.data ( ) is also.. Problem `` how to get or set attributes and values of the attribute below syntax step... Reasons this is the equivalent of jQuery 's $.data ( ) jQuery methods, data-attributes! A how-to guide for using HTML data attributes to any number of elements from elements. ) jQuery methods attributes are not intended to compete with microformats is set to lowercase letters.! Attributes you can see, this method is used to store the idto. `` value set data attribute javascript to the page or application document.getelementsbyclassname ( “ ” ) [ ]... Dataset API, much like the classList, as we explored before developers able. After they are not used by the browser, but also modify data-attributes these attributes via is. Arbitrary data, developers are able to avoid unneccessary AJAX calls and enhance user experience a guide. Text files, on your computer opinion ; back them up with or... Inbuilt setAttribute ( ) function of JavaScript bring a single shot of live ammunition onto the plane from to! In CSS * - how bad did I just mess up data variable...