CSS基础构架及标准

CSS Architecture

base.less - Provide style reset and atomic functions

• the project module(.epc-page) styles
• body styles
• font-family
• font-size
• color
• width factor
• common width

common.less - Abstract the component styles common to the site.

• page layout
• responsive width
• common component styles

page.less - A particular style of a particular page.

• All function pages must have their scope
• Defining global styles is prohibited

CSS Written Order

• Location attribute (position, top, right, z-index, display, float ...)
• Size (width, height, padding, margin ...)
• Text series (font, line-height, letter-spacing, color- text-align ...)
• Background (background, border ...)
• Other (animation, transition ...)

CSS Written Standard

abbreviation

CSS has some properties that can be abbreviated, such as padding, margin, font, etc. This streamlines the code while improving the user's reading experience.

Remove the "0" before the decimal point

Abbreviated name-Easy to understand, but not casual.

Hyphenated CSS selector naming convention

Long names or phrases can use the middle dash to name selectors.
It is not recommended to use the "_" underscore to name the CSS selector. Why?

1. Press the shift key a little while typing.
2. Browser compatibility issues (named after a selector using _tips, for example, is invalid in IE6)
3. Well-distributed JavaScript variable naming (JS variable name is "_")

Do not use id freely

The ID is unique and high priority, so we should use it on demand.

Less usage

Variables

@nice-blue: #5B83AD;
#header {
    color: @nice-blue;
}

We can define the font, size, color, etc. as constants.

Mixins

.bordered {
    border-top: dotted 1px black;
    border-bottom: solid 2px black;
}

.post a {
    color: red;
    .bordered;
}

We can transfer variables, Usage is similar to functions

Nested Rules

.header {
    color: black;
}

.header .navigation {
    font-size: 12px;
}

.header-logo {
    width: 300px;
}


.header {
    .navigation {
        font-size: 12px;
    }
    &-logo {
        width: 300px;
    }
}

Directives such as media or keyframe can be nested in the same way as selectors.

Namespaces and Accessors

#bundle {
    .button {
        display: block;
        border: 1px solid black;
        background-color: grey;
        &:hover {
            background-color: white
        }
    }
    .tab {
    ...
    }
    .citation {
    ...
    }
}

We should use the component's namespace and scope.

Scope

@var: red;
#page {
   @var: white;
   #header {
      color: @var; // white
   }
}