Material-UI中的高级样式 [英] Advanced styling in material-ui

问题描述

我开始研究material-ui，并在SandBox中创建一个简单的应用程序: https://codesandbox.io/s/eager-ride-cmkrc

I start to study material-ui and create a simple app in the SandBox: https://codesandbox.io/s/eager-ride-cmkrc

jss的样式对我来说并不常见，但是如果您通过这两个简单的练习帮助我，那么我将理解所有内容.

The style of jss is unusual for me, but if you help me with these two simple exercises, then I will understand everything.

首先:我想将ButtonLeft和ButtonRight的通用属性合并到新类中并对其进行扩展:(

First: I want union common properties of ButtonLeft and ButtonRight into new class and extend it: (https://github.com/cssinjs/jss-extend#use-rule-name-from-the-current-styles-object)

ButtonControll: {
    display: "none",
    position: "absolute",
    fontSize: "24px"
},
ButtonLeft: {
    extend: 'ButtonControll',
    left: "0",
},
ButtonRight: {
    extend: 'ButtonControll',
    right: "0",
}

但这是行不通的=(

第二:我希望当您将鼠标悬停在容器上时出现箭头，所以我这样写:

Second: I want the arrows to appear when you hover over the container, so I wrote this:

"&:hover .MuiIconButton-root": {
    display: "block"
}

问题:MuiIconButton-root它是所有IconButton的基类名称吗?但我想要这样的东西:

Problem: MuiIconButton-root it is base className for all IconButtons? but I want something like this:

"&:hover ButtonLeft": {
    display: "block",
    backgroundColor: 'red' 
},
"&:hover ButtonRight": {
    display: "block",
    fontSize: '50px' 
}

请帮我完成这两个简单的任务，然后我会理解一切=)

Please, help me with these two simple tasks and then I will understand everything =)

推荐答案

jss-plugin-extend默认不包含在Material-UI中.

jss-plugin-extend is not included by default in Material-UI.

您可以在此处找到包含的JSS插件的列表: https://material -ui.com/styles/advanced/#jss-plugins .

You can find the list of included JSS plugins here: https://material-ui.com/styles/advanced/#jss-plugins.

您可以按照说明添加其他插件，但是也可以通过其他方式达到相同的效果.

You can follow the instructions for adding additional plugins, but you can also achieve the same effect in other ways.

您可以将通用属性放在对象中

You can put the common properties in an object:

const commonButton = {
  display: "none",
  position: "absolute",
  fontSize: "24px"
};
export default props => ({
  ButtonLeft: {
    ...commonButton,
    left: "0",
  },
  ButtonRight: {
    ...commonButton,
    right: "0",
  }
});

或者因为您有一个root规则，即按钮在结构上位于其中，所以您可以通过root中的嵌套规则应用所有常见样式:

Or since you have a root rule that the buttons are structurally within, you could apply all the common styles via nested rules in root:

export default props => ({
  root: {
    width: "250px",
    height: "182px",
    alignItems: "center",
    justifyContent: "space-between",
    border: "1px solid black",
    position: "relative",
    "& $ButtonLeft, & $ButtonRight": {
      display: "none",
      position: "absolute",
      fontSize: "24px"
    },
    "&:hover $ButtonLeft, &:hover $ButtonRight": {
      display: "block"
    }
  },
  ButtonLeft: { left: "0" },
  ButtonRight: { right: "0" }
});

上面的示例利用了 jss-plugin-nested 默认情况下， 包含在Material-UI中.这也显示了hover引用的适当语法.

The example above leverages jss-plugin-nested which is included in Material-UI by default. This also shows the appropriate syntax for the hover references.

相关答案:

• 使用材料ui createStyles
• 如何将JS中的CSS用于嵌套悬停样式，材质UI

• Using material ui createStyles
• how to use css in JS for nested hover styles, Material UI

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