css – 媒体查询分组而不是匹配的多个分散媒体查询

我正在尝试LESS(不是SASS语法的粉丝)并且一直试图找出用它进行媒体查询的最佳方法.

我通过this博文阅读了如何用LESS“做”媒体查询,但它指出了这导致所有媒体查询被分离并分散在整个CSS中的事实.这并没有真正打扰我(我可以不关心结果,更多关心它的工作).困扰我的是一条评论,该评论在从iOS设备查看时讨论了问题,而评论者发现,一旦整合了媒体查询,问题就解决了.

有没有人找到使用LESS媒体查询的好解决方案？

我开始这种工作的方式就像……

//Have an overall structure...
.overall(){
    //Have ALL your CSS that would be modified by media queries and heavily use
    //variables that are set inside of each media queries.
}
@media only screen and (min-width: 1024px){
    //Define variables for this media query (widths/etc)
    .overall
}

我知道这可能存在一些问题,但目前的设置似乎并没有那么有用.

所以我想我的问题是,是否有任何好的解决方案/黑客允许分组媒体查询？

(只是因为我使用无点作为解析我的.less文件的引擎)

解决方法

首先,您在问题中给出的解决方案肯定对它有一些用处.

然而,我认为有一件事是将所有媒体查询变量定义为“接近”彼此很好(你的解决方案会在每次媒体查询调用下都有它们).所以我提出以下作为替代解决方案.它也有缺点,一个可能在前面编码更多.

少量代码

//define our break points as variables
@mediaBreak1: 800px;
@mediaBreak2: 1024px;
@mediaBreak3: 1280px;

//this mixin builds the entire media query based on the break number
.buildMediaQuery(@min) {
    @media only screen and (min-width: @min) { 

        //define a variable output mixin for a class included in the query
        .myClass1(@color) {
            .myClass1 {
               color: @color;
            }
        }

        //define a builder guarded mixin for each break point of the query
        //in these is where we change the variable for the media break (here,color)
        .buildMyClass1() when (@min = @mediaBreak1) {
           .myClass1(red);
        }
        .buildMyClass1() when (@min = @mediaBreak2) {
           .myClass1(green);
        }
        .buildMyClass1() when (@min = @mediaBreak3) {
           .myClass1(blue);
        }

        //call the builder mixin
        .buildMyClass1();

        //define a variable output mixin for a nested selector included in the query
        .mySelector1(@fontSize) {
           section {
              width: (@min - 40);
              margin: 0 auto;
              a {
                font-size: @fontSize;
              }
           } 
        }

        //Again,define a builder guarded mixin for each break point of the query
        //in these is where we change the variable for the media break (here,font-size)
        .buildMySelector1() when (@min = @mediaBreak1) {
           .mySelector1(10px);
        }
        .buildMySelector1() when (@min = @mediaBreak2) {
           .mySelector1(12px);
        }
        .buildMySelector1() when (@min = @mediaBreak3) {
           .mySelector1(14px);
        }

        //call the builder mixin
        .buildMySelector1();

        //ect.,ect.,etc. for as many parts needed in the media queries.
    }
}

//call our code to build the queries
.buildMediaQuery(@mediaBreak1);
.buildMediaQuery(@mediaBreak2);
.buildMediaQuery(@mediaBreak3);

CSS输出

@media only screen and (min-width: 800px) {
  .myClass1 {
    color: #ff0000;
  }
  section {
    width: 760px;
    margin: 0 auto;
  }
  section a {
    font-size: 10px;
  }
}
@media only screen and (min-width: 1024px) {
  .myClass1 {
    color: #008000;
  }
  section {
    width: 984px;
    margin: 0 auto;
  }
  section a {
    font-size: 12px;
  }
}
@media only screen and (min-width: 1280px) {
  .myClass1 {
    color: #0000ff;
  }
  section {
    width: 1240px;
    margin: 0 auto;
  }
  section a {
    font-size: 14px;
  }
}