父级的 javascript 父级
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javascript parent of parent
提问by user2126833
In javascript is there an easy way to target the parent of a parent?
在 javascript 中是否有一种简单的方法来定位父级的父级？
I'm using this.parentNodeas the element of a function to select the parent, and I tried both this.parent.parentNodeand this.parentNode.parentNode, but both simply return the direct parent.
I'm trying to affect the div surrounding the div surrounding the 'this'. I did manage to make it work using a simple loop statement that repeats the parentNode selection twice, but I assume there's a better way.
我this.parentNode用作函数的元素来选择父项，我尝试了两者this.parent.parentNode和this.parentNode.parentNode，但都只是返回直接父项。
我试图影响围绕“this”的 div 周围的 div。我确实设法使用一个简单的循环语句使其工作，该语句重复 parentNode 选择两次，但我认为有更好的方法。
回答by T.J. Crowder
this.parentNode.parentNodeis correct, you must (with apologies!) have had a mistake in the test where you tried it.
this.parentNode.parentNode是正确的，您必须（抱歉！）在您尝试的测试中出错。
HTML:
HTML：
<div id="outermost">Outermost
<div id="inner1">Inner 1
<div id="inner2">Inner 2</div>
</div>
</div>
JavaScript:
JavaScript：
var inner2 = document.getElementById("inner2");
display("inner2.id = " + inner2.id);
display("inner2.parentNode.id = " + inner2.parentNode.id);
display("inner2.parentNode.parentNode.id = " + inner2.parentNode.parentNode.id);
display("Try clicking the blue 'inner2' above");
inner2.onclick = function(e) {
display("Click: this.id = " + this.id);
if (this.parentNode) {
display("Click: this.parentNode.id = " + this.parentNode.id);
if (this.parentNode.parentNode) {
display("Click: this.parentNode.parentNode.id = " + this.parentNode.parentNode.id);
}
}
};
function display(msg) {
var p = document.createElement('p');
p.innerHTML = String(msg);
document.body.appendChild(p);
}
Output (assuming one clicks as directed):
输出（假设按指示单击）：
inner2.id = inner2 inner2.parentNode.id = inner1 inner2.parentNode.parentNode.id = outermost Try clicking the blue 'inner2' above Click: e.target.id = inner2 Click: e.target.parentNode.id = inner1 Click: e.target.parentNode.parentNode.id = outermost
