小编zha*_*x93的帖子

我写了这个跟随LESS网站的文档,mixins部分,我认为它可以工作,但引发语法错误:

SyntaxError: properties must be inside selector blocks, they cannot be in the
root. in less/style.less on line 3, column 3:  
2 .bg (@x; @y) {  
3   background-position: unit(@x, px) unit(@y, px);  
4 }

这是Less:

.bg (@x; @y) {
  background-position: unit(@x, px) unit(@y, px);
}
.mydiv (@x:0; @y:-52; @width:300px; @height: 155px) {
  .bg(@x, @y);
  width: @width;
  height: @height;
  opacity: 1;
}

.mydiv()

另外,如果我只使用多个参数,则会导致相同的错误:

SyntaxError: properties must be inside selector blocks, they cannot be in the  
root. in less/style.less on line …