React出现Unexpected token语法错误求助：期望逗号，意外标记报错

Hey there! Let's break down this confusing error and figure out what's going on.

First, let's decode the error message: "Unexpected token, expected ," (22:4) means that when the JavaScript parser was reading your code at line 22, character 4, it encountered a symbol it didn't expect (in this case, the )}). Instead, it was expecting a comma ( ,) because that's what the current code structure should have required at that point.

Why This Is Happening #

Looking at your code snippet:

20 | </div>
21 | </div>
> 22 | )}
| ^
23 | </section>
24 | );
25 | }

This )} on line 22 is almost certainly a misplaced closing for a JavaScript expression inside your JSX (like a conditional render or array map call). Here's the most common scenario:

You probably wrote something like a conditional render using &&, and accidentally closed the expression too early, before your outer <section> tag. For example, if your code was supposed to look like this:

function MyComponent() {
  return (
    <section>
      {isSomeConditionTrue && (
        <div>
          <div>
            {/* Your content here */}
          </div>
        </div>
      )} {/* This )} correctly closes the conditional expression */}
    </section>
  );
}

But instead, you placed the )} right after the inner </div></div>, leaving the </section> hanging outside the valid JSX structure. The parser sees the ) on line 22 and thinks you've closed the return() statement early, so when it hits </section> next, it has no idea what to do—hence the "unexpected token" error.

How to Fix It #

• Trace the matching brackets: Look back in your code to find where the ( that pairs with the ) on line 22 starts. It should be inside a { } block (like {condition && (). Make sure this entire expression is nested inside your <section> tag, so the )} comes before </section>.
• Check your return statement boundaries: The ( after return should wrap your entire JSX output. That means <section>...</section> must sit fully between that opening ( and the closing ); on line 24.
• Format your code: Use a formatter like Prettier (most IDEs have this built-in) to auto-indent your code. Misplaced brackets or tags will stand out immediately when the indentation looks wrong.

Don't worry—this kind of mix-up is super common when you're getting used to JSX's mix of HTML-like syntax and JavaScript. Once you trace those brackets, it'll click right into place!

内容的提问来源于stack exchange，提问作者zipfstein