The hover feature in jQuery may encounter issues when implemented with Angular's ng-repeat directive on objects

I have successfully implemented a jQuery hover function:

$('.deleteButton').hover(function(){
    $(this).css('opacity', '1');
},
function(){ 
    $(this).css('opacity', '.5');
});

The function was functioning properly when the HTML element was hardcoded into the index.html document, but now when I import the element from a template, it does not work as expected.

Below is the template code:

<div class="logBox">
<div class="dateAndLocation">
    <p>{{ info.date | date }}</p>
    <p style="margin-top:-.7em">{{ info.location }}</p>
</div>
<div class="routeNameBox">
    <p class="routeName">{{ info.routeName }}</p>
    <p class="gradeAndType">{{ info.grade }} | {{ info.type }}</p>
</div>
<div class="timeAndLevelBox">
    <div class="timeBox pull-left">
        <p class="timeText">{{ info.time }}</p>
    </div>
    <div class="pclBox pull-right">
        <p class="pclText">{{ info.challengeLevel }}</p>
    </div>
</div>

<div class="notesBox">
    <p class="notesText">{{ info.notes }}</p>
</div>

<div class="photoCircle" style="background-image:url({{ info.photo }})"></div>
</div>

<div class="deleteButton"><p>&#8212;</p></div>

index.html code:

<div class="container" style="min-width:1200px; margin:auto;" ng-repeat="climbLog in climbLogs">
    <climb-log info="climbLog"></climb-log>
<div>

Although the indexing works fine and repeats as expected, the opacity of the delete button does not change upon hovering over it, contrary to the specifications in the jQuery function (which had previously worked before using the template).

Answer №1

One issue that arises is that the $(...).hover(...) function only attaches a hover handler to nodes that currently exist, excluding any future nodes that may match the selector and be added later.

To address this issue, using jQuery's on with live selector functionality is recommended:

$('#placeWithDeleteButtons').on('hover', '.deleteButton', ...)
. This approach attaches the handler on an ancestor element that captures the event bubble and checks if the triggering descendant matches the selector. As a result, you only need one handler to manage events for current and future matching nodes.

It is worth noting, as some comments suggest, that utilizing Angular's equivalents would be advantageous in an Angular project context.

EDIT: It should be noted that the use of hover needs to be replaced with mouseenter and mouseleave:

$('.logBox').on("mouseenter mouseleave", ".deleteButton", function(evt) {
  $(this).css('opacity', evt.type === 'mouseenter' ? 1 : 0.5);
});
.deleteButton {
  opacity: 0.5;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="logBox">
  <button class="deleteButton">Foo</button>
</div>

However, if the sole purpose is to change opacity on hover, a simpler method can be employed:

.deleteButton {
  opacity: 0.5;
}
.deleteButton:hover {
  opacity: 1;
}
  
<div class="logBox">
  <button class="deleteButton">Foo</button>
</div>

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