我第一次使用Brunch.io来构建一个新的React应用程序。
似乎一切正常,但是当我尝试设置状态或使用箭头功能时,出现语法错误。我的猜测是我缺少Babel预设或其他配置。
有人可以帮忙,或者不知道这件丢失的东西可能是什么吗?
控制台错误:
09:27:18 - error: Compiling of app/components/index.js failed. Error: SyntaxError: app/components/index.js: Unexpect
ed token (10:15)
| * @return {string} formatted list of authors
| */
> | getAuthors = (arr) => {
| ^
| if (arr) {
| return arr.join('\r\n');
| } else {
package.json
{
"name": "brunch-app",
"description": "Brunch.io application",
"private": true,
"author": "Brunch",
"version": "0.0.1",
"repository": "",
"scripts": {
"start": "brunch watch --server",
"build": "brunch build --production"
},
"dependencies": {
"prop-types": "^15.6.0",
"react": "^16.0.0",
"react-dom": "^16.0.0",
"react-redux": "^5.0.6",
"react-router-dom": "^4.2.2",
"redux": "^3.7.2"
},
"devDependencies": {
"auto-reload-brunch": "^2",
"hmr-brunch": "^0.1",
"babel-brunch": "~6.0.0",
"babel-preset-latest": "^6",
"babel-preset-react": "~6.22",
"brunch": "^2",
"clean-css-brunch": "^2",
"uglify-js-brunch": "^2"
}
}
brunch-config.js:
exports.files = {
javascripts: {
joinTo: 'app.js'
},
stylesheets: {joinTo: 'app.css'}
};
exports.plugins = {
babel: {presets: ['es2015', 'react']}
};
exports.hot = true;
组件/index.js无法编译:
import React from 'react';
class Book extends React.Component {
state = {
authors: [],
books: [],
};
getAuthors = (arr) => {
if (arr) {
return arr.join('\r\n');
} else {
return 'Unknown author';
}
};
render() {
return (
<li>
{book.authors && book.authors.map((author) => (
<span className='book-authors'>{author}</span>
))}
</li>
);
}
}
export default Book;
最佳答案
getAuthors
是一个类属性。这是一个拟议的演变,您可以使用babel-plugin-transform-class-properties使Babel对其进行转译
关于reactjs - 带有React和Babel语法错误的Brunch.io,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47198446/