Updates the identicon in a specified element.

jdenticon.update(element|selector[, hash|value[, config]])


The following example shows how to use the update method to render an icon on demand without using the data-jdenticon-value or data-jdenticon-hash attribute.

Update icon

<canvas id="identicon" width="100" height="100">

<script src="https://cdn.jsdelivr.net/npm/jdenticon@3.1.0/dist/jdenticon.min.js"
    jdenticon.update("#identicon", "ff8adece0631821959f443c9d956fc39");


element|selector can be either a <canvas> element, an <svg> element or a CSS selector to a <canvas> or <svg> element. If the selector evaluates to multiple elements, all elements are updated.

If the second parameter hash|value contains a hexadecimal string of at least 11 characters it is considered a valid hash and used as base for the icon. If it contains any other value it is hashed using SHA1. If null or undefined is specified, or if the parameter is omitted, the function will in first hand look for a data-jdenticon-hash attribute on the element, in second hand for a data-jdenticon-value attribute.

config (from v2.2.0) specifies an optional configuration object. If no configuration is specified, the global configuration is used. For backward compability this parameter can also be a padding value in the range 0.0 to 0.5.


The methods jdenticon.updateCanvas() and jdenticon.updateSvg() do the same thing as this method, but do only support a single element type. If you only use a single element type (<svg> or <canvas>), then the more specific methods are preferred since they provide better code optimization opportunities for bundlers, keeping your JavaScript bundle as small as possible.

The following priority order is used to resolve the icon configuration when the icon is drawn:

  1. config parameter passed to update()
  2. Configuration object passed to jdenticon.configure().
  3. jdenticon_config global variable.

See also