如何解决解析错误:缺少半隆?
我是新手反应,我正在尝试通过构建书籍列表Web应用程序来学习。
保存我的代码时,我会在Localhost中获得以下内容:
汇编的问题:错误src/components/booklist.js第2行:5: 解析错误:缺少半隆。 (2:5)
有booklist.js文件:
import React from "react";
import Book from "./Book";
import "./BookList.css";
import { BookContext } from "../context/BookContext";
import { ThemeContext } from "../context/ThemeContext";
export default class BookList extends React.Component {
render() {
return (
<ThemeContext.Consumer>
{(contextTheme) => (
<BookContext.Consumer>
{(contextBook) => {
const { books } = contextBook;
const { changeColorTheme, isDarkMode, dark, light} = contextTheme;
const theme = isDarkMode ? dark : light;
return (
<section className="page-section" style={{ backgroundColor: theme.bg, color: theme.color }} id="portfolio">
<div className="container">
<div className="text-right"><button className="btn btn-danger" onClick={changeColorTheme}>Change Mood</button></div>
<div className="text-center"><h2 className="section-heading text-uppercase">My Book Folio</h2><h3 className="section-subheading text-muted">subheading</h3></div>
<div className="row">
{books.map((book, index) => {
return <Book book={book} key={index} />;
})}
</div>
</div>
</section>
);
}}
</BookContext.Consumer>
)}
</ThemeContext.Consumer>
);
}
}
我已经浏览了代码,看不到缺少的结肠。我唯一的想法是,我没有注意到其他一些语法错误。
有人对如何调试有任何想法或任何建议吗?
I'm new to React and I'm trying to learn by building a book list web application.
When saving my code I'm getting the following in localhost:
Compiled with problems: ERROR src/Components/BookList.js Line 2:5:
Parsing error: Missing semicolon. (2:5)
There is the BookList.js File:
import React from "react";
import Book from "./Book";
import "./BookList.css";
import { BookContext } from "../context/BookContext";
import { ThemeContext } from "../context/ThemeContext";
export default class BookList extends React.Component {
render() {
return (
<ThemeContext.Consumer>
{(contextTheme) => (
<BookContext.Consumer>
{(contextBook) => {
const { books } = contextBook;
const { changeColorTheme, isDarkMode, dark, light} = contextTheme;
const theme = isDarkMode ? dark : light;
return (
<section className="page-section" style={{ backgroundColor: theme.bg, color: theme.color }} id="portfolio">
<div className="container">
<div className="text-right"><button className="btn btn-danger" onClick={changeColorTheme}>Change Mood</button></div>
<div className="text-center"><h2 className="section-heading text-uppercase">My Book Folio</h2><h3 className="section-subheading text-muted">subheading</h3></div>
<div className="row">
{books.map((book, index) => {
return <Book book={book} key={index} />;
})}
</div>
</div>
</section>
);
}}
</BookContext.Consumer>
)}
</ThemeContext.Consumer>
);
}
}
I've looked through the code and I can't see the missing colon. My only other thought is that there's some other syntax error I haven't noticed.
Does anyone have any idea or any recommendations on how to debug this?
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我在返回语句中重写了代码,并且Web应用程序有效。我试图比较代码,但是,我看不到原始问题在哪里。
这是工作代码的图像
如果您弄清楚了,请让我知道。我很想知道原因是什么。
I rewrote the code in the return statement and the web application worked. I've tried to compare the code, however, I can't see where the original issue was.
Here is an image of the working code
If you figure it out please let me know. As I would love to know what the cause was.