Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Errors/Bad_return below:

SyntaxError: return not in function - JavaScript

当 return 语句在函数外部被调用时，JavaScript 会抛出“return not in function”异常。

SyntaxError: Illegal return statement (V8-based)
SyntaxError: return not in function (Firefox)
SyntaxError: Return statements are only valid inside functions. (Safari)

SyntaxError。

return 语句在函数外部被调用了。可能是某处缺失了花括号？return 语句必须位于函数内部，因为它会终止函数执行并指定一个值返回给函数调用者。

function cheer(score) {
  if (score === 147)
    return "最大！";
  }
  if (score > 100) {
    return "世纪！";
  }
}

// SyntaxError: return not in function

花括号乍一看之下似乎是正确的，但这段代码在第一个 if 语句后缺少了一个 {。正确的写法应该是：

function cheer(score) {
  if (score === 147) {
    return "最大！";
  }
  if (score > 100) {
    return "世纪！";
  }
}

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4