这篇文章主要介绍了JS 使用for循环配合数组遍历子节点查找元素
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function nextChildNode(node,clazz,tagName){
var count= node.childElementCount;
for ( var i=0;i<count;i++){
if (node==undefined || node.children[i]==undefined){
continue ;
}
if (clazz){
if (node.children[i].getAttribute( 'class' )==clazz){
return node.children[i];
}
} else {
if (node.children[i].tagName==tagName){
return node.children[i];
}
}
}
return null ;
}
function getChildNode(node,classArg,tagNodeArg){
for ( var i=0;i<classArg.length;i++){
node=nextChildNode(node,classArg[i]);
}
for ( var i=0;i<tagNodeArg.length;i++){
node=nextChildNode(node, null ,tagNodeArg[i]);
}
return node;
}
function getItemId(node){
var classNode=[ 'itemInfo' , 'itemDesc' ],tagNode=[ 'P' , 'BUTTON' ];
node=getChildNode(node,classNode,tagNode);
alert(node.getAttribute( 'itemid' ));
}
#调用函数
getItemId($( ".shopItem" )[0]);
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