element.hasAttribute

Table of contents

  1. 1. Summary
  2. 2. Syntax
  3. 3. Example
  4. 4. Notes
  5. 5. Specification
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Table of contents
  1. 1. Summary
  2. 2. Syntax
  3. 3. Example
  4. 4. Notes
  5. 5. Specification

« Gecko DOM Reference

Summary

hasAttribute returns a boolean value indicating whether the specified element has the specified attribute or not.

Syntax

var result = element.hasAttribute(attName);
  • result holds the return value true or false.
  • attName is a string representing the name of the attribute.

Example

// check that the attribute exists before setting a value 
var d = document.getElementById("div1"); 
if (d.hasAttribute("align")) { 
  d.setAttribute("align", "center"); 
}

Notes

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods Namespace-aware variants (DOM Level 2) DOM Level 1 methods for dealing with Attr nodes directly (seldom used) DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1) setAttributeNS setAttributeNode setAttributeNodeNS
getAttribute (DOM 1) getAttributeNS getAttributeNode getAttributeNodeNS
hasAttribute (DOM 2) hasAttributeNS - -
removeAttribute (DOM 1) removeAttributeNS removeAttributeNode -

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