4.3. 属性嵌套 (Nested Properties)

本文介绍Sass如何通过命名空间简化CSS属性管理,避免重复输入,如将font-family,font-size等属性嵌套在font命名空间下。同时展示了如何在命名空间中定义属性值。

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有些 CSS 属性遵循相同的命名空间 (namespace),比如 font-family, font-size, font-weight 都以 font 作为属性的命名空间。为了便于管理这样的属性,同时也为了避免了重复输入,Sass 允许将属性嵌套在命名空间中,例如:

.funky {
  font: {
    family: fantasy;
    size: 30em;
    weight: bold;
  }
}

编译为

.funky {
  font-family: fantasy;
  font-size: 30em;
  font-weight: bold; }

命名空间也可以包含自己的属性值,例如:

.funky {
  font: 20px/24px {
    family: fantasy;
    weight: bold;
  }
}

编译为

.funky {
  font: 20px/24px;
    font-family: fantasy;
    font-weight: bold; }
2025-03-27 15:35:22.815 ERROR 26436 - [restartedMain] [o.s.b.web.embedded.tomcat.TomcatStarter,onStartup,61] : Error starting Tomcat context. Exception: org.springframework.beans.factory.UnsatisfiedDependencyException. Message: Error creating bean with name 'jwtFilter': Unsatisfied dependency expressed through field 'jwtUtil'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jwtUtil': Unsatisfied dependency expressed through field 'userCache'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userCache': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userGroupService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'groupServiceImpl': Unsatisfied dependency expressed through field 'departmentService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'departmentServiceImpl': Unsatisfied dependency expressed through field 'deptUserService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deptUserServiceImpl': Unsatisfied dependency expressed through field 'userSetupService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userSetupServiceImpl': Unsatisfied dependency expressed through field 'roleService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'roleServiceImpl': Unsatisfied dependency expressed through field 'rolePrivService'; nested exception is org.springframework.beans.factory.UnsatisfiedDepend
03-28
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