At what point do browsers automatically insert CSS styles as attributes without them being explicitly defined?

Greetings Code Gurus,

I find myself grappling with an unexpected CSS anomaly while developing a website.

Here is the puzzling code snippet:

<div id="..." style="padding-bottom: 78px; padding-top: 78px;" >...</div>

These styles are manifesting on elements that have not been explicitly given these properties in the source code. Even upon inspecting the page source, there is no trace of such styling!

Hence, my query arises - what could be triggering the generation of these mysterious styles?

In the specific scenario I am dealing with, the <div> element has the following CSS assignments:

position: absolute;
top: 0px;
right: 0px;
height: 100%;
-moz-box-align: center;
-moz-box-pack: center;
display: -moz-box;
padding-bottom: 15px;
padding-top: 15px;
box-sizing: border-box;

Regardless of the browser being used (Firefox/Chrome/Internet Explorer), it is evident that the padding-top and padding-bottom styles are being overridden by the aforementioned inline styles.

What crucial detail am I overlooking here? Where should I begin my investigation for clues?

Answer №1

Alright, after some investigation following the suggestions in the comments, it turns out that the unexpected behavior was actually caused by JavaScript.

Initially, I was convinced that JavaScript wasn't the issue since I had removed all JS scripts from my page, but there were a few lingering ones.

Big thanks to everyone who contributed, particularly shennan and Paulie_D for their insights.

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