Element: hasAttributeNS() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Thuộc tính hasAttributeNS() của giao diện Element trả về a boolean value indicating whether the current element has the specified attribute with the specified namespace.
If you are working with HTML documents and you don't need to specify the requested attribute as being part of a specific namespace, use the hasAttribute() method instead.
Cú pháp
js
hasAttributeNS(namespace,localName)
Tham số
Giá trị trả về
Một boolean.
Ví dụ
js
// Check that the attribute exists before you set a value
const d = document.getElementById("div1");
if (
d.hasAttributeNS("http://www.mozilla.org/ns/specialspace/", "special-align")
) {
d.setAttribute("align", "center");
}
Đặc tả kỹ thuật
| Specification |
|---|
| DOM> # ref-for-dom-element-hasattributens①> |