Having trouble with implementing Jquery for inserting an element and then animating it using CSS through a class change

Question

Having trouble with implementing Jquery for inserting an element and then animating it using CSS through a class change

I am trying to insert an element using the "insertAfter" method and then add a class to trigger a CSS animation.

It seems to work when I use a timeout function:

First Approach (with Timeout)

$content.insertAfter($("#2"));
setTimeout(function(){
    $content.addClass("blue"); 
}, 100);

However, it does not work when I try to add the class directly after inserting the element:

Second Approach (without Timeout)

$content.insertAfter($("#2")).addClass("blue");

Is there another solution that does not involve using a timeout function?

You can view my code in this fiddle: http://jsfiddle.net/b2eybnoy/

jquery css animation

Answer 1

Answer №1

The reason for this behavior is that the CSS transition relies on a rendered style being altered.

When the newly created element is inserted, it has not been rendered by the browser yet. Changing the class immediately will prevent the transition from animating.

Instead of using setTimeout, you can employ certain techniques to force the browser to render the element's styles visually, such as manipulating a visual property:

See updated JsFiddle for demonstration

$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2"));
    $content.offset();
    $content.addClass("blue");
});

Answer 2

The reason for this behavior is that the CSS transition relies on a rendered style being altered.

When the newly created element is inserted, it has not been rendered by the browser yet. Changing the class immediately will prevent the transition from animating.

Instead of using setTimeout, you can employ certain techniques to force the browser to render the element's styles visually, such as manipulating a visual property:

See updated JsFiddle for demonstration

$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2"));
    $content.offset();
    $content.addClass("blue");
});

Answer 3

Answer №2

When adding content to the DOM, it may take some time and work asynchronously. This means that adding a class to an element is often done before the element actually appears in the DOM. As such, it's advisable to use a timeout in these cases.

UPDATE: I came across a more efficient solution at this link.

Answer 4

When adding content to the DOM, it may take some time and work asynchronously. This means that adding a class to an element is often done before the element actually appears in the DOM. As such, it's advisable to use a timeout in these cases.

UPDATE: I came across a more efficient solution at this link.

Answer 5

Answer №3

Before showing the new div, remember to first hide it, then apply the new style, and finally fade in the fresh content.

Take a look at this fiddle: http://jsfiddle/net/schwietertj/mtxf6vx0/

$(document).ready(function(){
$("#1").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2"));
    setTimeout(function(){
        $content.addClass("blue"); 
    }, 100);
});
$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2")).hide();
    $content.addClass("blue").fadeIn(500);
});
});

Answer 6

Before showing the new div, remember to first hide it, then apply the new style, and finally fade in the fresh content.

Take a look at this fiddle: http://jsfiddle/net/schwietertj/mtxf6vx0/

$(document).ready(function(){
$("#1").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2"));
    setTimeout(function(){
        $content.addClass("blue"); 
    }, 100);
});
$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2")).hide();
    $content.addClass("blue").fadeIn(500);
});
});

Answer 7

Answer №4

When you append a div tag to your document and then immediately change the class name, the CSS engine may not recognize this change in order to run the animation properly. To resolve this issue, you can utilize the following code:

Check out the DEMO here

$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2")).show(function(){
        $content.addClass("blue");
    }) 
});

Answer 8

When you append a div tag to your document and then immediately change the class name, the CSS engine may not recognize this change in order to run the animation properly. To resolve this issue, you can utilize the following code:

Check out the DEMO here

$("#2").click(function(){
    var $content = $("<div class='red'></div>");
    $content.insertAfter($("#2")).show(function(){
        $content.addClass("blue");
    }) 
});

Having trouble with implementing Jquery for inserting an element and then animating it using CSS through a class change

Answer №1

Answer №2

Answer №3

Answer №4

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