What does .container mean. \ 31 25 \ 25 in CSS?

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4

I'm doing a self-study on a responsive site. In a tutorial I got, there are in the CSS file instructions like: 

.container. 25 {
    width: 100%;
    max-width: 1750px;
    min-width: 1400px;
}

.container. 5 {
    width: 1050px;
}

.container. 0 {
    width: 700px;
}

.container. 5 {
    width: 350px;
}

What is the meaning of: 

.container. 25 
.container. 5
.container. 0
.container. 5
    
asked by anonymous 15.03.2017 / 22:57

1 answer

2

According to the CSS specification , they are escape characters, because the identifiers of the CSS can not have special characters, or better, they can only have characters aZ and 1-9, characters ISO 10646, hyphen and underscore. 

.container. 25 = .container.125%
.container. 5  = .container.75%
.container. 0  = .container.50%
.container. 5  = .container.25%
    
15.03.2017 / 23:23
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