Hanci XML DOM hasChildNodes()

Element 对象

tafaɗin da kuma amfani

idan abin da yana da ɗan takamman abin haka yana da ɗan takamman abin haka hasChildNodes() hanci yana taimakawa true, amma yana taimakawa false.

kalami

elementNode.hasChildNodes()

wurin shirin

kaɗanin da zai kammala "books.xml" gaɗon xmlDoc, kuma yana kammala sabon <book> ba zaɗaɗa ba koyaushe ba?}

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
   if (this.readyState == 4 && this.status == 200) {
       myFunction(this);
   }
};
xhttp.open("GET", "books.xml", true);
xhttp.send();
function myFunction(xml) {
    var xmlDoc = xml.responseXML;
    var x = xmlDoc.getElementsByTagName('book')[0];
    document.getElementById("demo").innerHTML =
    x.hasChildNodes();
}

亲自试一试

Element 对象