Comment vérifier l'existence d'un élément avec jQuery après avoir utilisé .append() ?

Verifying Element Existence in jQuery

When attempting to ascertain the presence of an element using the .append() method, the default syntax of $('elemId').length may prove ineffective. This issue arises from the omission of the hash (#) before the element identifier.

Solution:

To successfully check the existence of an element created via the .append() method, the proper syntax requires the inclusion of a hash (#) before the element's ID. Here's the corrected code:

$('#elemId').length

Rationale:

In JavaScript, accessing elements by ID typically involves using the document.getElementById() method without the hash. However, when using jQuery, the hash (#) is essential for targeting elements based on their ID, analogous to the behavior in CSS.

Therefore, to verify the existence of an element created using the .append() method, the corrected syntax $('#elemId').length must be employed, ensuring that the hash precedes the element's ID.

Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!