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Metoda Element.hasAttribute() reda o valoare de tip Boolean, indicand daca elementul selectat detine atributul specificat sau nu.

Sintaxa

var result = element.hasAttribute(attName);
  • result retine valoarea returnata - true sau false.
  • attName este de tip String reprezentand numele atributului. 

Exemplu

// 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 -

Specifications

Specification Status Comment
DOM
The definition of 'Element.hasAttribute()' in that specification.
Living Standard From Document Object Model (DOM) Level 3 Core Specification, moved from Node to Element
Document Object Model (DOM) Level 3 Core Specification
The definition of 'Element.hasAttribute()' in that specification.
Recommendation No change from Document Object Model (DOM) Level 2 Core Specification
Document Object Model (DOM) Level 2 Core Specification
The definition of 'Element.hasAttribute()' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) 8.0 (Yes) (Yes)
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)

Document Tags and Contributors

 Contributors to this page: AndreiChirila
 Last updated by: AndreiChirila,