Why does the removeChild method in JavaScript consistently remove the last child element, rather than the one specified by its ID?

There are four divs with an event listener onclick, triggering a JavaScript function that simply removes the clicked div:

this.parentNode.removeChild(this);

Although it should remove the specific div clicked on, it instead deletes the last child and alters the id assigned to it. The id then decreases by one with each successive click on other divs, removing the childNodes in reverse order.

I have tried various alternatives, such as:

document.getElementById('parentElementName').removeChild(this.getAttribute('id'));

or

const parent = document.getElementById('parentElementName');
const to_be_removed = document.getElementById(this.getAttribute('id'));

parent.removeChild(to_be_removed);

and using childNodes // id = 1,2,3,4:

const to_be_removed = document.getElementById('box_content').childNodes[parseInt(this.getAttribute('id'))];
const parent = document.getElementById('box_content');

parent.removeChild(to_be_removed);

Interestingly, I can successfully modify visibility or backgroundColor:

document.getElementById('box_content').childNodes[parseInt(this.getAttribute('id'))].style.visibility = 'hidden';

Answer №1

Successfully recreated your original design, visit http://jsfiddle.net/abc123/ to view it. Does this meet your requirements?

If you are using IE and employing attachEvent, the context of this in the event handler may be the global object instead of your intended element. Otherwise, I'm unsure why your code is not functioning as expected.

Answer №2

Upon inspecting your code, I noticed a couple of errors. Your second example should function properly, provided that you make the following adjustments (see comments):

// Ensure that this references the parent element's ID, not its name.
    parent = document.getElementById('parentElementName'); 

// Note the double 't' in getAttribute; also, you are missing a closing bracket.
    to_be_removed = document.getElementById(this.gettAttribute('id'); 

// Everything seems good here.
    parent.removeChild(to_be_removed);

Another example worth considering: jsfiddle

To simplify matters, you could simply call

this.parentNode.removeChild(this)
within an onclick handler.

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