如何通过反应将道具传递给样式化组件中的关键帧？

Question

我有以下代码，我想将 y 的值从 React 组件传递到 moveVertically 关键帧。可以这样做吗？

import React from 'react';
    import styled, {keyframes} from 'styled-components';


    const moveVertically = keyframes`
        0% {
            transform : translateY(0px) 
        }
        100% {
            transform : translateY(-1000px) //I need y here
        }
    `;

    //I can access y in here via props but can't send it above
    const BallAnimation = styled.g`
        animation : ${moveVertically} ${props => props.time}s linear
    `;


    export default function CannonBall(props) {

        const cannonBallStyle = {
            fill: '#777',
            stroke: '#444',
            strokeWidth: '2px',
        };

        return (
            <BallAnimation time = {4} y = {-1000}>
                <circle cx = {0} cy = {0} r="25" style = {cannonBallStyle}/>
            </BallAnimation>
        );
    }

Answer 1

如何制作 moveVertically returns keyframes 样式组件的函数？

这样你就可以传入你想要的道具了：

const moveVertically = (y) =>
  keyframes`
    0% {
      transform: translateY(0px);
    }
    100% {
      transform: translateY(${y}px);
    }
  `

const BallAnimation = styled.g`
  animation: ${props => moveVertically(props.y)} ${props => props.time}s linear;
`

Answer 2

您可以使 moveVertically 成为一个函数。请考虑以下代码：

const moveVertically = (y) => keyframes`
    0% {
        transform : translateY(0px) 
    }
    100% {
        transform : translateY(${y}px)
    }
`;

const BallAnimation = styled.g`
    animation : ${props => moveVertically(props.y)} ${props => props.time}s linear
`;

在 BallAnimation 的道具中有 y。因此，您可以提取它并将其传递给接受 y 值作为参数的 moveVertically 函数。

Answer 3

这个使用 typescript 的进度条动画示例

    export const animatedProgress = (y:number) => keyframes`
0%{
      width: 0%;
    }
    25%{
        width:  ${y >= 25 ? 25 : y}%;
    }
    50%{
      width:  ${y >= 50 ? 50 : y}%;
    }
    75%{
      width:  ${y >= 75 ? 75 : y}%;
    }
    100%{
      width:  ${y >= 100 ? 100 : y}%;
    }

`;

export const ProgressAnimated = styled("div")<progressAnimated>`

animation : ${props => animatedProgress(props.value)} 3s linear;
`;

如何通过反应将道具传递给样式化组件中的关键帧？

How to pass props to keyframes in styled-component with react?

reactjs

styled-components