javascript - 在 ReactJs 中创建动态 svg 图标组件

Question

我想为我的 SVG 图标创建一个 React 组件，但如果我在另一个组件中多次使用这个组件(使用不同的属性)，它总是呈现相同的图标。

我的 icon.js 组件:

import { ReactComponent as ArrowDown} from '../assets/icons/icons-line-arrrow-down.svg';
import { ReactComponent as ArrowUp} from '../assets/icons/icons-line-arrrow-up.svg';

const iconTypes = {
  arrowDown: ArrowDown,
  arrowUp: ArrowUp,
}

const IconComponent = ({name, ...props}) => {
  let Icon = iconTypes[name];
  return <Icon {...props} />;

};

export default IconComponent

用法:

import Icon from 'components/Icon';

有效:

class MyComponent extends React.PureComponent {
  render() {
    return (
      <div>
        <Icon name={"arrowDown"}/>
      </div>
    )}
}

它也有效:

class MyComponent extends React.PureComponent {
  render() {
    return (
      <div>
        <Icon name={"arrowUp"}/>
      </div>
    )}
}

它呈现 ArrowDown 图标两次:

class MyComponent extends React.PureComponent {
  render() {
    return (
      <div>
        <Icon name={"arrowDown"}/>
        <Icon name={"arrowUp"}/>
      </div>
    )}
}

所以我的问题是:为什么当我两次使用我的组件时，只有第一个 SVG 图标被渲染了几次，如何修复它？

Answer 1

您的代码运行良好，我已经从中创建了代码片段:

CodeSandbox (JavaScript)

CodeSandbox (TypeScript)

index.js

import React from "react";
import ReactDOM from "react-dom";
import Icon from "./icon";

function App() {
  return (
    <div>
      <Icon name="arrowUp" />
      <Icon name="arrowDown" />
    </div>
  );
}

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

icon.js

import React from "react";
import { ReactComponent as ArrowDown } from "./arrow-down.svg";
import { ReactComponent as ArrowUp } from "./arrow-up.svg";

const iconTypes = {
  arrowDown: ArrowDown,
  arrowUp: ArrowUp
};

const IconComponent = ({ name, ...props }) => {
  let Icon = iconTypes[name];
  return <Icon {...props} />;
};

export default IconComponent;