Pure CSS3 Speech Bubbles with transparent background

Brief Tutorial

This is a Speech Bubbles dialogue bubble effect with a transparent background made using pure CSS3. This speech bubble uses two transparent png images as the background, and combines them into a speech bubble effect through simple CSS code.

Usage

HTML structure

The HTML structure of the dialogue bubble is as follows:

<a class="speech-bubble" href="#">
    <div class="speech-content">
        lorem ipsum ascilet
    </div>
    <div class="speech-tail"></div>
</a>

CSS style

The entire dialogue bubble is wrapped in In a hyperlink element, the display attribute of the hyperlink element is set to inline-block, while the transparency is reduced to 50%, and the animation transition effect is set for the transparency animation.

.speech-bubble {
    display: inline-block;
    opacity:0.5;
    transition: opacity 0.5s;
}

When the mouse slides over the speech bubble, the transparency of the hyperlink element returns to 100%.

.speech-bubble:hover {
    opacity:1;
    transition: opacity 0.5s;
}

.speech-content is the content box area of ​​the dialogue bubble. Its minimum width min-width is set to 80 pixels and the inner margin is 10 pixels. All edges except the bottom edge are set to a 3 pixel white border. Also use a fully transparent PNG image for its background.

.speech-content {
    display:inline-block;
    min-width: 80px;
    padding:10px;
    text-align:center;
    color:white;
    border: solid white;
    border-width: 3px 3px 0px 3px;
    background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAACXBIWXMAABN2AAATdgEGLb1yAAAAIGNIU
    k0AAHolAACAgwAA+f8AAIDpAAB1MAAA6mAAADqYAAAXb5JfxUYAAABSSURBVHja7NGxDQAgEAOxgNh/5dBTU718G1i32mZCO0MCAQEBAQEBAQEBAQEBAQEBAQE
    BAQEBAQEBAQEBAQEBAQEBAXk6SeoIyP8uAAAA//8DAH02BGIBTpeBAAAAAElFTkSuQmCC') 48px 100% no-repeat;
    background-size: calc(100% - 48px) 50px;
}

.speech-tail is the tail of the bubble dialog box. It sets a fixed width and height, and also uses a transparent PNG image as the background.

.speech-tail {
    height:25px;
    width: 52px;
    margin-top:-3px;
    background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAZCAYAAAB+Sg0DAAAACXBIWXMAAA3XAAAN1wFCKJt4AAAAIGNIUk0A
    AHolAACAgwAA+f8AAIDpAAB1MAAA6mAAADqYAAAXb5JfxUYAAAFXSURBVHja1NgxKEVRHMfxc5+QKDHJJqOsyqzMbzApGWwyGGxKWWxSSiZZyKJMFmUyyCqjbD
    KxMFDP+9h0nR7v8fTePb+6wz3//z2nb/fe8//9TwahhcqyLPuPeTAbQjiMx0shQWExhHBQK1ZKEGY1hLATQshauWh8farJeTd91QX6kwNCB/YimFP0JPeG0IXj
    COYIncl9cujFWQSzi1Krf9ymgTCAywhmo107UVNAGMJ1BLPSzq31z0AYwW3ukXcstLtW/AkIY7jPpb9hpgjF79dAmMBjLvUF00Wp5r8CwhSec2lPmCySPWkYCG
    W85lIeMF40v9UQEOZRyYXvMFpEA1kXCMuo5kI3GC6qI/4RCOtRjbnCYJEt/rdA2I7uz9FX9J7lJ6C8TtCdQhPWCNA+OlLpKusBbSELqagO0FqKhxi1gKpYSvFQ
    phZQBXMhVdUAKrdq7Y8BABcTlsw7evjMAAAAAElFTkSuQmCC') top left no-repeat ;
    background-size: 100% 100%;
}

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