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Element.hasAttribute()

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Sintaxa
Exemplu
Notes
Specifications
Browser compatibility

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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.

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)

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Contributors to this page: AndreiChirila

Last updated by: AndreiChirila, 9 feb. 2016, 08:08:38