[javascript] How can I get the values of data attributes in JavaScript code?

Modern browsers accepts HTML and SVG DOMnode.dataset

Using pure Javascript's DOM-node dataset property.

It is an old Javascript standard for HTML elements (since Chorme 8 and Firefox 6) but new for SVG (since year 2017 with Chorme 55.x and Firefox 51)... It is not a problem for SVG because in nowadays (2019) the version's usage share is dominated by modern browsers.

The values of dataset's key-values are pure strings, but a good practice is to adopt JSON string format for non-string datatypes, to parse it by JSON.parse().

Using the dataset property in any context

Code snippet to get and set key-value datasets at HTML and SVG contexts.

_x000D_
_x000D_
console.log("-- GET values --")_x000D_
var x = document.getElementById('html_example').dataset;_x000D_
console.log("s:", x.s );_x000D_
for (var i of JSON.parse(x.list)) console.log("list_i:",i)_x000D_
_x000D_
var y = document.getElementById('g1').dataset;_x000D_
console.log("s:", y.s );_x000D_
for (var i of JSON.parse(y.list)) console.log("list_i:",i)_x000D_
_x000D_
console.log("-- SET values --");_x000D_
y.s="BYE!"; y.list="null";_x000D_
console.log( document.getElementById('svg_example').innerHTML )
_x000D_
<p id="html_example" data-list="[1,2,3]" data-s="Hello123">Hello!</p>_x000D_
<svg id="svg_example">_x000D_
  <g id="g1" data-list="[4,5,6]" data-s="Hello456 SVG"></g>_x000D_
</svg>
_x000D_
_x000D_
_x000D_

Examples related to javascript

need to add a class to an element How to make a variable accessible outside a function? Hide Signs that Meteor.js was Used How to create a showdown.js markdown extension Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Summing radio input values How to execute an action before close metro app WinJS javascript, for loop defines a dynamic variable name Getting all files in directory with ajax

Examples related to html

Embed ruby within URL : Middleman Blog Please help me convert this script to a simple image slider Generating a list of pages (not posts) without the index file Why there is this "clear" class before footer? Is it possible to change the content HTML5 alert messages? Getting all files in directory with ajax DevTools failed to load SourceMap: Could not load content for chrome-extension How to set width of mat-table column in angular? How to open a link in new tab using angular? ERROR Error: Uncaught (in promise), Cannot match any routes. URL Segment

Examples related to custom-data-attribute

How can I get the values of data attributes in JavaScript code? jQuery: get data attribute jQuery find element by data attribute value Using HTML data-attribute to set CSS background-image url Adding data attribute to DOM Why does JS code "var a = document.querySelector('a[data-a=1]');" cause error? How to set data attributes in HTML elements jQuery Data vs Attr? Unable to set data attribute using jQuery Data() API Select elements by attribute in CSS