从选中的单选按钮获取文本节点

Question

Here is a piece of html for a radio button that is currently selected:

<label>
    <input type="radio" name="reason" value="1" data-promo="1">
    "some text here bla bla"
</label>

With a line of JS I found over here I am able to grab the input element but not the text:

document.querySelector('input[name="reason"]:checked');

Returns:

<input type="radio" name="reason" value="1" data-promo="1">

How would I grab the text that follows this element "some text here bla bla"?

Answer 1

The text node is the next sibling of the checkbox so

 function test() { var checkbox = document.querySelector('input[name="reason"]:checked'); if (checkbox) { var text = checkbox.nextSibling.textContent; alert(text); } } 

 <label> <input type="radio" name="reason" value="1" data-promo="1">text 1 </label> <label> <input type="radio" name="reason" value="2" data-promo="2">text 2 </label> <label> <input type="radio" name="reason" value="3" data-promo="3">text 3 </label> <label> <input type="radio" name="reason" value="4" data-promo="4">text 4 </label> <button onclick="test()">Test</button> 

Answer 2

If you don't know the position of the text in advance, then the simpliest option is to access the textContent property of the parent label element:

document.querySelector('input[name="reason"]:checked').parentElement.textContent;

Of course, this assumes that is the only text node in the label element.

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Alternatively, if the text always appears after the input element, then you could just access the textContent property of the next sibling :

document.querySelector('input[name="reason"]:checked').nextSibling.textContent;

Answer 3

If you want to using javascript as you do then try this-

alert(document.querySelector('input[name="reason"]:checked').nextSibling.textContent);

You may do something like this using jQuery as well,

$('input[name="reason"]').on("click", function(){
    alert($(this).closest("label").text());
});

Answer 4

I did a small change to the your code. Added data-txt and used getAttribute

var a = document.querySelector('input[name="reason"]:checked').getAttribute("data-txt");
alert(a);

Check how this works for you.