element.hasAttribute
ๆฆ่ฆ
hasAttribute
ใฏๆๅฎใฎ่ฆ็ด ใๆๅฎใฎๅฑๆงใๆใคใๅฆใใ็คบใ็ๅฝๅคใ่ฟใใพใใ
ๆงๆ
var result = element.hasAttribute(attName);
result
: true ใพใใฏ false ใฎๆปใๅคใไฟๆattName
: ๅฑๆงใฎๅๅใ่กจใๆๅญๅใๆๅฎ
ไพ
ๅฏพ่ฑกๅฑๆงใฎๅญๅจใใใงใใฏใใ็กใๅ ดๅใซใฎใฟๅฑๆงใ่จญๅฎใใไพใไปฅไธใซ็คบใใพใใ
var d = document.getElementById("div1"); // ๅฏพ่ฑก่ฆ็ด ใๅๅพ
if ( !d.hasAttribute("align") ) {
d.setAttribute("align", "center");
}
ๆณจ่จ
DOM ใกใฝใใใฏ่ฆ็ด ใฎๅฑๆงใๅใๆฑใใพใใ
ๅๅ็ฉบ้ใซ็ก้ขไฟใ ๆใไธ่ฌ็ใซไฝฟ็จใใใใกใฝใใ |
ๅๅ็ฉบ้ใซ้ๅฎใใใๅคๆฐ (DOM Level 2) |
Attr ใใผใใ็ดๆฅๆฑใ DOM ใฌใใซ 1 ใฎใกใฝใใ(ใปใจใใฉไฝฟ็จใใใชใ) |
Attr ใใผใใ็ดๆฅๆฑใ DOM ใฌใใซ 2 ๅๅ็ฉบ้ใซ้ๅฎใใใใกใฝใใ(ใปใจใใฉไฝฟ็จใใใชใ) |
---|---|---|---|
setAttribute (DOM 1) |
setAttributeNS |
setAttributeNode |
setAttributeNodeNS |
getAttribute (DOM 1) |
getAttributeNS |
getAttributeNode |
getAttributeNodeNS |
hasAttribute (DOM 2) |
hasAttributeNS |
- | - |
removeAttribute (DOM 1) |
removeAttributeNS |
removeAttributeNode |
- |