如何在MUI中应用自定义动画效果@keyframe？

我已经学会了使用@keyframe在CSS中使用动画。但是，我想要将我的自定义动画代码编写到我的Reaction项目中(使用MUI)。我的挑战是如何编写Javascript代码来使用MUI中的makeStyle()自定义我的动画。

我希望能够以百分比自定义转换过程 这一次是在MUI。我需要能够在makeStyle()中编写这样的代码，但我似乎不知道如何编写。

@keyframes myEffect {
 0%{
  opacity:0;
  transform: translateY(-200%); 
 }

100% {
  opacity:1;
  transform: translateY(0);
 }
}

---

解决方案

这里有一个示例演示了makeStyles中的keyframes语法：

import React from "react";
import ReactDOM from "react-dom";

import { makeStyles } from "@material-ui/core/styles";
import Button from "@material-ui/core/Button";
import clsx from "clsx";

const useStyles = makeStyles(theme => ({
  animatedItem: {
    animation: `$myEffect 3000ms ${theme.transitions.easing.easeInOut}`
  },
  animatedItemExiting: {
    animation: `$myEffectExit 3000ms ${theme.transitions.easing.easeInOut}`,
    opacity: 0,
    transform: "translateY(-200%)"
  },
  "@keyframes myEffect": {
    "0%": {
      opacity: 0,
      transform: "translateY(-200%)"
    },
    "100%": {
      opacity: 1,
      transform: "translateY(0)"
    }
  },
  "@keyframes myEffectExit": {
    "0%": {
      opacity: 1,
      transform: "translateY(0)"
    },
    "100%": {
      opacity: 0,
      transform: "translateY(-200%)"
    }
  }
}));

function App() {
  const classes = useStyles();
  const [exit, setExit] = React.useState(false);
  return (
    <>
      <div
        className={clsx(classes.animatedItem, {
          [classes.animatedItemExiting]: exit
        })}
      >
        <h1>Hello CodeSandbox</h1>
        <h2>Start editing to see some magic happen!</h2>
        <Button onClick={() => setExit(true)}>Click to exit</Button>
      </div>
      {exit && <Button onClick={() => setExit(false)}>Click to enter</Button>}
    </>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

文档：https://cssinjs.org/jss-syntax/?v=v10.0.0#keyframes-animation

---

对于已开始使用Material-UI v5并希望了解如何使用情感(而不是makeStyles)执行此操作的用户，下面是使用情感执行相同样式的一种方法示例。

/** @jsxImportSource @emotion/react */
import React from "react";
import ReactDOM from "react-dom";

import { css, keyframes } from "@emotion/react";
import { useTheme } from "@mui/material/styles";
import Button from "@mui/material/Button";

const myEffect = keyframes`
  0% {
    opacity: 0;
    transform: translateY(-200%);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
`;
const myEffectExit = keyframes`
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-200%);
  }
`;

function App() {
  const theme = useTheme();
  const animatedItem = css`
    animation: ${myEffect} 3000ms ${theme.transitions.easing.easeInOut};
  `;
  const animatedItemExiting = css`
    animation: ${myEffectExit} 3000ms ${theme.transitions.easing.easeInOut};
    opacity: 0;
    transform: translateY(-200%);
  `;
  const [exit, setExit] = React.useState(false);
  return (
    <>
      <div css={exit ? animatedItemExiting : animatedItem}>
        <h1>Hello CodeSandbox</h1>
        <h2>Start editing to see some magic happen!</h2>
        <Button onClick={() => setExit(true)}>Click to exit</Button>
      </div>
      {exit && <Button onClick={() => setExit(false)}>Click to enter</Button>}
    </>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

情感关键帧文档：https://emotion.sh/docs/keyframes