Html data attribute array. Use JSON. The dataset read-only property of the HTMLElement interface provides read/write access to custom data attributes (data-*) on elements. data ( key ) Jul 13, 2012 · How to use the new HTML5 data storage feature with jQuery data function for adding data into a HTML5 page and passing custom settings into jQuery code. The data-* attributes allow us to embed custom attributes on all HTML elements. These properties are linked to data attributes on the controller’s element: Dec 17, 2011 · So I ended up assigning an index to each html button: <td><button class='delete' data-index='"+i+"' >Delete</button></td>, and storing an array of JSON objects in a $objects variable. In this tutorial, I will show you how to store array in html data-attribute and access it in JavaScript. data() method automatically tries to convert the string in your custom data attribute to whatever type it appears to be (in this case an array). Jun 26, 2022 · Sometimes, we want to store and retrieve JavaScript arrays into and from HTML5 data attributes. Dec 5, 2018 · jQuery's . JSON will work and it looks like you're on the right path. The stored (custom) data can then be used in the page's JavaScript to create a more engaging user experience (without any Ajax calls or server-side database queries). version added: 1. ﹟ Properties and Attributes Stimulus automatically generates getter, setter, and existential properties for each value defined in a controller. Nov 26, 2010 · One slight gotcha: You need single quotes to enclose the data-foo html attribute and double quotes for valid JSON. Apr 9, 2020 · To store JSON objects in HTML attribute is essential concept. Feb 18, 2015 · I want to change the value of data-test in HTML in a way that $value will contain an array with two elements "15" and "17". A view of the array’s data is used instead of a copy if possible. In my environment I can only change the data-test attribute of the span. Jul 23, 2025 · Any attribute whose name starts with data- is a custom attribute. To run the above program, save the file name “anyName. . JavaScript just treats it as a string, so you need to parse the string to get the same array output you get with jQuery. 2. In this example, we create an array called elements that contains objects representing HTML elements, along with their attributes. it returns the value as string. With valid JSON (I simply generate it with json_encode () in php) then you escape any double quotes in the data itself to \". Learn how HTML data attribute improves JavaScript interactions, customizes elements, and improves dynamic web applications. Jul 11, 2025 · The HTML data-* attributes allow you to store custom data directly in HTML elements, making passing information between HTML and JavaScript easier. Dec 22, 2020 · Data attributes are actually HTML attributes that allow you to create and assign bespoke data points to HTML elements. Select the option “Open with Live Server” in VS Code editor. They are accessible via HMTL, CSS, and JavaScript, making them a powerful choice for storing bits of information that maybe aren’t so appropriate for class lists or id s. Syntax: <element data-*="value"> Your second code snippet looks more like you wanted to select an HTML element that contains a number in its data attribute array, rather than check if a given data attribute array contains a value. html)” and right click on the file. The data stored can be used in JavaScript of the page. If you want to work with the values as an Jan 25, 2022 · What I understand it that HTML attributes always have strings as their values. We can also use these data attributes to style our elements. The data-* attribute is used to store custom data private to the page or application. What is the precise method to store the array and Jul 22, 2025 · Use data attributes HTML is designed with extensibility in mind for data that should be associated with a particular element but need not have any defined meaning. Oct 6, 2025 · If a self-described xarray or pandas object, attempts are made to use this array’s metadata to fill in other unspecified arguments. It exposes a map of strings (DOMStringMap) with an entry for each data-* attribute. Description: Return arbitrary data associated with the first element in the jQuery collection, as set by data () or by an HTML5 data-* attribute. data-* attributes allow us to store extra information on standard, semantic HTML elements without other hacks such as non-standard attributes, or extra properties on DOM. It's standard to use double quotes (") to delimit attribute values in HTML, not single quotes ('). How can I retrieve the value as an integer array? It returns a string because you're using attr(). The data-* attribute gives us the ability to embed custom data attributes on all HTML elements. These are completely ignored by the user. Jun 3, 2021 · Why this integer array of values appeared within double quotes? Because that's the type of quotes the HTML renderer uses. We then loop through the array, create the corresponding HTML elements, set their attributes using setAttribute, and append them to an existing container element in the DOM. parse, and make sure you're using single quotes around the brackets and double quotes inside the brackets. html (index. You can definitely store an array converted into string though as a value in data-* attribute. Aug 18, 2022 · Learn how to use HTML data attributes to store string-formatted data on elements for seamless integration with JavaScript and CSS. This method improves interactivity in web applications without requiring server-side involvement or AJAX calls. How can a JavaScript array be stored in an HTML custom data attribute? I've tried every variation of JSON stringification and escaping characters. coords (sequence or dict of array_like or Coordinates, optional) – Coordinates (tick labels) to use for indexing along each dimension. The HTML5 data attribute can store only strings, so if you want to store an array you will need to serialize it. Our example shows how to embed JSON array in HTML attribute and how to get it. 3. For example: Feb 20, 2015 · I was writing some view code today where jQuery would pick-up values of button data attribute (array of ids) and make Ajax calls to to server based on values. The stored (custom) data can then be used in the page's JavaScript to create a more engaging user experience (without any Ajax calls or server-side database queries Sep 25, 2025 · Learn how to effectively retrieve and convert HTML `data` attributes that contain integer arrays from strings into actual arrays using JavaScript and jQuery. Jan 11, 2009 · You're right data- attributes are more relevant and widely supported now, but how do you store a 2D array in a data-attribute easily? For something like that I think @johny-why 's answer is very practical and accessible. Aug 5, 2020 · The data-* attributes gives us the ability to embed custom data attributes on all HTML elements. You can use arrays and hashes in HTML5 data attributes. jw1uajscexwea1jrks6tsubq0jakawevz8oj9ot4ltiz