[英]LESS if statement for build targets
I'm looking for functionality in LESS to be able to change one variable and have it change a bunch of different variables so that I can change my compile target and have it easily change a ton of variables. 我正在寻找LESS中的功能,以便能够更改一个变量并使它更改许多不同的变量,以便我可以更改编译目标并使其轻松更改大量变量。
Here's an example of what I'm looking for. 这是我要寻找的示例。 The only problem is that that because I redefine @img
inside .compile_for_if
it's in another scope. 唯一的问题是,因为我在.compile_for_if
重新定义了@img
, .compile_for_if
它在另一个作用域中。
@compile_for: "endpoint1";
@img_endpoint1: "./myImg.png";
@img_endpoint2: "https://somewhere.com/myImg.png";
@img: "./default.png";
.compile_for_if
{
& when (@compile_for = "endpoint1")
{
@img: @img_endpoint1;
}
& when (@compile_for = "endpoint2")
{
@img: @img_endpoint2;
}
}
... somewhere else ...
.img
{
background-image:url("@{img}");
}
You can achieve this by using enclosing all your rules within a nameless namespace ( &{...}
) and then calling your .compile_for_if
mixin within its scope. 您可以通过将所有规则包含在无名命名空间( &{...}
)中,然后在其范围内调用.compile_for_if
mixin来实现此目的。 This would expose all variables set within the .compile_for_if
into the namespace and thereby all rules will be able to access it. 这会将.compile_for_if
设置的所有变量都暴露给名称空间,因此所有规则都将能够访问它。 ( Note: You would have to change your .compile_for_if
definition also like given below.) ( 注意:您还必须更改.compile_for_if
定义,如下所示。)
@compile_for: "endpoint1";
@img_endpoint1: "./myImg.png";
@img_endpoint2: "https://somewhere.com/myImg.png";
@img: "./default.png";
/* Added another set of conditional variables to illustrate */
@padding1: 10px;
@padding2: 20px;
@padding: 5px;
.compile_for_if when (@compile_for = "endpoint1"){
@img: @img_endpoint1;
@padding: @padding1;
}
.compile_for_if when (@compile_for = "endpoint2"){
@img: @img_endpoint2;
@padding: @padding2;
}
&{
.compile_for_if();
.img{
background-image:url("@{img}");
}
div{
padding: @padding;
}
}
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