如何通过反应将道具传递给样式组件中的关键帧？

Question

我有以下代码，我想将y的值从反应组件传递到moveVertically关键帧。 有可能这样做吗？

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

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
`;

在这里你有y在BallAnimation 的道具中。 因此，您可以提取它并将其传递给moveVertically函数，该函数接受 y 值作为参数。

Answer 2

如何使moveVertically成为返回关键帧样式组件的函数？

这样，你就可以传入你想要的道具：

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 3

此示例用于使用打字稿的进度条的动画

    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;
`;

Answer 4

const Stick = styled("div")(() => ({
  "@keyframes gradient": {
    "0%": {
      backgroundPosition: "0% 50%",
    },
    "50%": {
      backgroundPosition: "100% 50%",
    },
    "100%": {
      backgroundPosition: "0% 50%",
    },
  },
  width: "40vw",
  height: "20vw",
  background:
    "linear-gradient(-45deg, #ee7752, #e73c7e, #9581F4, #23a6d5, #23d5ab)",
  animation: "gradient 10s ease infinite",
}));

Answer 5

我有以下代码，我想将y值从 react 组件传递到moveVertically关键帧。 有可能这样做吗？

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>
        );
    }