有没有一种通用的方法可以在LESS中添加供应商前缀? [英] Is there a generic way to add vendor prefixes in LESS?

问题描述

我目前有一个mixins.less文件，几乎所有的mixin基本上都是相同的:

I currently have a mixins.less file, where almost all mixins are basically the same:

.border-radius(@radius) {
  -webkit-border-radius: @radius;
   -khtml-border-radius: @radius;
     -moz-border-radius: @radius;
          border-radius: @radius;
}

.box-shadow(@value) {
  -webkit-box-shadow: @value;
   -khtml-box-shadow: @value;
     -moz-box-shadow: @value;
          box-shadow: @value;
}

有没有办法创建某种通用的mixin，我可以这样称呼:

Is there a way to create some kind of generic mixin, that I could call like this:

.vendor('border-radius', '3px');
.vendor('box-shadox', '10px 10px');

哪个会产生与上述相同的结果?

and which would produce the same result as above?

推荐答案

注意:

建议停止使用此技术，并考虑使用专用的前缀工具(例如 Autoprefixer ， -无前缀等).如今，通过CSS预处理器mixin(Less，SCSS或其他任何东西)对供应商前缀进行硬编码是一种纯粹的反模式，并且被认为是有害的.自动前缀工具将使您的代码干净，易读，面向未来，并易于维护/自定义.

Notice:

The recommendation is to stop rely on this technique and consider using a dedicated prefixing tool (e.g. Autoprefixer, -prefix-free etc.). Hardcoding vendor prefixes via CSS pre-processor mixins (Less, SCSS or whatever) is a pure anti-pattern these days and considered harmful. Auto-prefixing tools will make your code clean, readable, future-proof and easily maintainable/customizable.

例如参见: less-plugin-autoprefix

See for example: less-plugin-autoprefix

好吧，当前LESS不支持属性名称插值"，因此您不能在属性名称中使用变量.但是，有一个黑客:如何在less中将属性名称作为参数传递给mixin 因此，如果您不介意输出CSS中的虚拟"属性，那么我们开始:

Well, currently LESS does not support "property name interpolation" so you cannot use a variable in property names. There's a hack however: How to pass a property name as an argument to a mixin in less So if you don't mind "dummy" properties in the output CSS, here we go:

.property_(@property, @value) {
    _: ~"; @{property}:" @value;
}

.vendor(@property, @value) {
    .property_('-webkit-@{property}', @value);
    .property_( '-khtml-@{property}', @value);
    .property_(   '-moz-@{property}', @value);
    .property_(          @property,   @value);
}

#usage {
    .vendor(border-radius, 3px);
    .vendor(box-shadow, 10px 10px);
}

输出:

#usage {
  _: ; -webkit-border-radius: 3px;
  _: ; -khtml-border-radius: 3px;
  _: ; -moz-border-radius: 3px;
  _: ; border-radius: 3px;
  _: ; -webkit-box-shadow: 10px 10px;
  _: ; -khtml-box-shadow: 10px 10px;
  _: ; -moz-box-shadow: 10px 10px;
  _: ; box-shadow: 10px 10px;
}

---

更新:

Less v1.6.0引入了属性插值功能，因此您现在不需要不再有任何骇客了:

---

Update:

Less v1.6.0 introduced Property Interpolation feature so now you don't need any hacks anymore:

.vendor(@property, @value) {
    -webkit-@{property}: @value;
     -khtml-@{property}: @value;
       -moz-@{property}: @value;
            @{property}: @value;
}

#usage {
    .vendor(border-radius, 3px);
    .vendor(box-shadow, 10px 10px);
}

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