onclick="doSomething([object Object])";未捕获的语法错误:意外的标识符 [英] onclick="doSomething([object Object])" Uncaught SyntaxError: Unexpected identifier

问题描述

var params = {a:1,b:2};var str = '<a href="#" onclick="doSomething('+params+')">aaaa</a>';document.write(str);

当我点击页面上的 时，它抛出Uncaught SyntaxError: Unexpected identifier".我无法理解.

when I click the <a> on the page,it throws "Uncaught SyntaxError: Unexpected identifier".I can't understand.

推荐答案

原因是当你使用字符串连接时，params 被强制转换为字符串，结果你得到类似 [object Object] 括号内.

The reason is that when you use string concatenation, params is casted to string, as result you get something like [object Object] in parenthesis.

你最好把参数设为 var params = '{a:1,b:2}';.

更新.
正如评论中所建议的，另一种可行的方法是使用 JSON.stringify:

var params = {a:1,b:2};
var str = '<a href="#" onclick="doSomething('
    + JSON.stringify(params)
    + ')">aaaa</a>';
document.write(str);

请注意，旧版浏览器可能不支持 JSON.stringify，您需要包含 附加库 使它们工作.

Please, pay attention that JSON.stringify may not be supported by older browsers and you'll need to include additional libraries to make them work.

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