Hi Florian Attribute selectors have less specificity than an ID, more than an element/tag, and the same as a class. var element = document.getElementById('important-data'); var string = element.textContent || element.innerText; // … How to use it: 1. JSON data (or any other data) inside data attributes …. e.g “data-gtm-event-“. Base64 & JSON Encode array in PHP, use as HTML data attribute, decode and parse in JavaScript … with proper Escaping. This works fine when I use the JavaScriptSerializer to serialize my .net object. To save a JSON in HTML data attribute, Stringy JSON object and encode it with “encodeURIComponent ()” method. For classic scripts, if the async attribute is present, then the classic script will be fetched in parallel to parsing and evaluated as soon as it is available. “Pickling” is the process whereby a Python object hierarchy is converted into a byte stream, and “unpickling” is the inverse operation, whereby a byte stream (from a binary file or bytes-like object) is converted back into an object hierarchy. Store content that should be accessible. CUSTOMIZED DATA ATTRIBUTE. Use built-in browser APIs to get form values as JSON. We will then append our JSON data to those elements. In case you’re needing to correct for possible capitalization inconsistencies in your data attributes, the attribute selector has a case-insensitive variant for that. It can be awfully handy to be able to make up your own HTML attributes and put your own information inside them. Your HTML becomes invalid, which may not have any actual negative consequences, but robs you of that warm fuzzy valid HTML feeling. It’s just a string and it’s possible to format it as valid JSON (mind the quotes and such). This is an ancient artifact of … Custom data attributes: are strings — you can store anything which can be string encoded, such as JSON. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. The word data, then a dash -, then other text you can make up. Say you have an article and you want to store some extra information that doesn’t have any visual representation. Your HTML becomes invalid, which may not have any actual negative consequences, but robs you of that warm fuzzy valid HTML feeling. I had no idea there was a JavaScript API for these or that you had so many options for selecting within CSS. This allows us to access the data using JavaScript. Open in app. IMO this is one step too much already. The first element contains HTML and the second element contains another JSON array with the data inside. Fortunately, you can! There are a variety of reasons this is bad. However, at times you need to store a bunch of metadata in data-* attributes. You can manipulate the sort operation however you need. JavaScript Object Notation (JSON) pronounced as "Jason" is the de facto standard for data interchange on the web these days. JSON Path Examples The following are some examples of using the Retrieve Attributes with JSON Path filter to retrieve data from a JSON message. I think attr() only works for the content property and it maybe has something to do with types (e.g. Inspecting the element will not show the data-attribute because there is no key specified for the value of the object. ; rdf:value is a new property that only appears in JSON. Argument: Description: json: a valid JSON; This can either be a string in valid JSON format or a python object that is either dict-like or list-like at the top level. Say you have an element with multiple data attributes (which is totally fine): If you have a reference to that element, you can set and get the attributes like: Note the camelCase usage on the last line there. Editor. DataContract and DataMember Attributes This sample shows how .NET Framework attributes such as DataContractAttribute , DataMemberAttribute and NonSerializedAttribute can be used with Json.NET instead of Json.NET's own attributes. myObj = JSON.parse(this.responseText); txt += "" document.getElementById("demo").innerHTML = txt; }} xmlhttp.open("POST", "json_demo_html_table.php", true); xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xmlhttp.send("x=" + dbParam); You can yank that data and parse it as needed. You’re essentially making up an attribute for yourself, which as I mentioned in the intro, is discouraged. For example, ID, … What is discouraged is making up your own attributes, or repurposing existing attributes for unrelated functionality. Make an HTML drop down list with data received as JSON: If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: