What is the best way to cover a specific area of a webpage in a responsive layout with CSS?

Question

What is the best way to cover a specific area of a webpage in a responsive layout with CSS?

When users interact with the page, multiple areas load asynchronously. Unlike hhgregg.com which masks the entire page, I want to mask only the specific region that is loading.

<div id="A">Loaded by Xhr</div>
<div id="B">Loaded by xhr based on actions with A</div>
<div id="C">Loaded by xhr based on action within B</div>

Since these regions are sized according to screen resolution, setting an absolute position for a loading gif won't work.

How can I use CSS to create a loading mask that covers just the div where the loading is happening? The loading mask itself is not the issue, it's figuring out how to target and fill only the desired div.

css

Answer 1

Answer №1

DEMO: http://jsfiddle.net/dwabU/1/

To create a masked effect on any specific DIV element, simply add the class masked to it.

CSS:

div.masked {
    position: relative;
}

div.masked:before {
    position:absolute;
    content: "MASKED CONTENT";
    display:block;
    width: 100%;
    height: 100%;
    background-color: rgba(70, 70, 70, 0.7);
    z-index:1;
    color: #ff0;
}

HTML:

<div id="A">Loaded by Xhr</div>
<div id="B" class="masked">Loaded by xhr based on actions with A</div>
<div id="C">Loaded by xhr based on action within B</div>

Answer 2

DEMO: http://jsfiddle.net/dwabU/1/

To create a masked effect on any specific DIV element, simply add the class masked to it.

CSS:

div.masked {
    position: relative;
}

div.masked:before {
    position:absolute;
    content: "MASKED CONTENT";
    display:block;
    width: 100%;
    height: 100%;
    background-color: rgba(70, 70, 70, 0.7);
    z-index:1;
    color: #ff0;
}

HTML:

<div id="A">Loaded by Xhr</div>
<div id="B" class="masked">Loaded by xhr based on actions with A</div>
<div id="C">Loaded by xhr based on action within B</div>

Answer 3

Answer №2

When creating your xhr script, remember to assign the loading div a class of loading. In your CSS file, you can style this class like so:

.loading{
background-image:url(loading.gif);
background-size:contain;
}

Answer 4

When creating your xhr script, remember to assign the loading div a class of loading. In your CSS file, you can style this class like so:

.loading{
background-image:url(loading.gif);
background-size:contain;
}

Answer 5

Answer №3

To ensure content is covered while AJAX is loading, apply a position:relative to each div that needs coverage. Utilize pseudo-elements for each div to create the covering effect.

For instance:
#B{position:relative;}

#B:before{content:""; position:absolute; top:0; left:0; width:100%; height:100%; background:black;display:none;}

Toggle the pseudo-element to display:block when AJAX is in progress, then hide it once the content is loaded.

Answer 6

To ensure content is covered while AJAX is loading, apply a position:relative to each div that needs coverage. Utilize pseudo-elements for each div to create the covering effect.

For instance:
#B{position:relative;}

#B:before{content:""; position:absolute; top:0; left:0; width:100%; height:100%; background:black;display:none;}

Toggle the pseudo-element to display:block when AJAX is in progress, then hide it once the content is loaded.

What is the best way to cover a specific area of a webpage in a responsive layout with CSS?

Answer №1

Answer №2

Answer №3

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