Javascript 获取元素的 id
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get an element's id
提问by Rana
Is there another way to get an DOM element's ID?
有没有另一种方法来获取 DOM 元素的 ID？
element.getAttribute('id')
回答by Nick Craver
Yes you can just use the .idpropertyof the dom element, for example:
myDOMElement.id
Or, something like this:
或者，像这样：
var inputs = document.getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
alert(inputs[i].id);
}
回答by Morteza Manavi
Yes you can simply say:
是的，你可以简单地说：
function getID(oObject)
{
var id = oObject.id;
alert("This object's ID attribute is set to \"" + id + "\".");
}
Check this out: ID Attribute | id Property
看看这个： ID 属性 | id 属性
回答by donohoe
This would work too:
这也可以：
document.getElementsByTagName('p')[0].id
(If element where the 1st paragraph in your document)
（如果元素位于文档中的第一段）
回答by Tj Laubscher
Super Easy Way is
超级简单的方法是
$('.CheckBxMSG').each(function () {
var ChkBxMsgId;
ChkBxMsgId = $(this).attr('id');
alert(ChkBxMsgId);
});
Tell me if this helps
告诉我这是否有帮助
回答by Kamil Kie?czewski
In events handler you can get id as follows
在事件处理程序中，您可以按如下方式获取 id
function show(btn) {
console.log('Button id:',btn.id);
}<button id="myButtonId" onclick="show(this)">Click me</button>回答by Xavier Felipe Medina
You need to check if is a string to avoid getting a child element
您需要检查是否是字符串以避免获取子元素
var getIdFromDomObj = function(domObj){
var id = domObj.id;
return typeof id === 'string' ? id : false;
};
回答by Jesper Engberg
This gets and alerts the id of the element with the id "ele".
这将获取并提醒 id 为“ele”的元素的 id。
var id = document.getElementById("ele").id;
alert("ID: " + id);
回答by unixmiah
Yes. You can get an element by its ID by calling document.getElementById. It will return an element node if found, and nullotherwise:
是的。您可以通过调用document.getElementById. 如果找到，它将返回一个元素节点，null否则：
var x = document.getElementById("elementid"); // Get the element with id="elementid"
x.style.color = "green"; // Change the color of the element
