Modifications made to the content of the element can disrupt the functioning of the delegated event handlers tied to its parent

Question

Modifications made to the content of the element can disrupt the functioning of the delegated event handlers tied to its parent

Currently, I am working on implementing a drop-down menu for a school project. While most of the functionality is in place, I encountered an issue with JQuery events that has me stumped. When I click on a list item, the name is set correctly, but then the events cease to work. I even tried putting the handlers on parent elements, but still no luck.

Below is a snippet of the JQuery code:

$(document).ready(function(){

$('nav ul').on('mouseenter', '.menu1', function(){
  $('.menu1 ul').removeClass("hidden");
});

$('nav ul').on('mouseleave', '.menu1', function(){
  setTimeout(function(){
    $('.menu1 ul').addClass("hidden");
  }, 300);
});

$('nav ul').on('click', '.menu1 ul li', function(){
  $('.menu1').text($(this).text());
});


});

I have also created a CodePen demo for the list:

https://codepen.io/JFarenci/pen/gvoQvq

javascript jquery html css dynamic-content

Answer 1

Answer №1

The problem lies within the line

$('.menu1').text($(this).text());

When this line is executed upon selecting an option, the content inside the li tag is replaced with something like this:

<li class="menu1">one</li>

(if 'one' was selected). This action causes the ul tag and dropdown menu to be replaced entirely.

To resolve this issue, create a separate area to display the selected option above the li tag.

HTML:

    <p id="selected"></p>

JAVASCRIPT:

    $('nav ul').on('click', '.menu1 ul li',function({
       $('#selected').text($(this).text());   
    });

I hope this solution helps fix the problem!

Answer 2

The problem lies within the line

$('.menu1').text($(this).text());

When this line is executed upon selecting an option, the content inside the li tag is replaced with something like this:

<li class="menu1">one</li>

(if 'one' was selected). This action causes the ul tag and dropdown menu to be replaced entirely.

To resolve this issue, create a separate area to display the selected option above the li tag.

HTML:

    <p id="selected"></p>

JAVASCRIPT:

    $('nav ul').on('click', '.menu1 ul li',function({
       $('#selected').text($(this).text());   
    });

I hope this solution helps fix the problem!

Answer 3

Answer №2

I updated the event handling in the code snippet by replacing the mouseenter and mouseleave events with mouseover.
Each click event now appends a span element with the text of the clicked item, preceded by a remove() to clear prior clicks.

Test the changes using the runnable snippet below.

$(document).ready(function() {

  $('nav ul').on('mouseover', '.menu1', function() {
    setTimeout(function() {
      $('.menu1 ul').show();
    }, 300);
  });

  $('nav ul').on('click', '.menu1 ul li', function() {
    $('.menu1').find("#click").remove();
    $('.menu1').append('<span id="click">' + $(this).text() + '<span>');
  });
});

nav {
  padding: 50px;
  text-align: center;
} 

 /* CSS styles omitted for brevity */

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<nav>
  <ul>
    <li class="menu1">
      <ul class="dropMenu hidden">
        <li>one</li>
        <li>two</li>
        <li>three</li>
        <li>fork</li>
      </ul>
    </li>
  </ul>
</nav>

Answer 4

I updated the event handling in the code snippet by replacing the mouseenter and mouseleave events with mouseover.
Each click event now appends a span element with the text of the clicked item, preceded by a remove() to clear prior clicks.

Test the changes using the runnable snippet below.

$(document).ready(function() {

  $('nav ul').on('mouseover', '.menu1', function() {
    setTimeout(function() {
      $('.menu1 ul').show();
    }, 300);
  });

  $('nav ul').on('click', '.menu1 ul li', function() {
    $('.menu1').find("#click").remove();
    $('.menu1').append('<span id="click">' + $(this).text() + '<span>');
  });
});

nav {
  padding: 50px;
  text-align: center;
} 

 /* CSS styles omitted for brevity */

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<nav>
  <ul>
    <li class="menu1">
      <ul class="dropMenu hidden">
        <li>one</li>
        <li>two</li>
        <li>three</li>
        <li>fork</li>
      </ul>
    </li>
  </ul>
</nav>

Modifications made to the content of the element can disrupt the functioning of the delegated event handlers tied to its parent

Answer №1

Answer №2

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