JavaScript 警报在 Firefox 6 中不起作用

Question

我尝试在 Firefox 6 的地址栏中运行此 JavaScript 代码:

javascript:alert("Hello")

我得到一个

ReferenceError: alert not defined.

它曾经在 Firefox 5 中运行良好，现在仍然可以在 Opera、Safari 和 Chrome 上运行。我该如何解决？

Answer 1

目前似乎不允许使用 javascript: 和 data: URL(直接在地址栏中)as per this comment :

FYI, I'm probably going to split this bug into multiple, short and longer term fixes.

Short term: disallow pasting of javascript: URLs into the URL bar
Longer term: additionally require that bookmarklets be "whitelisted" in the Bookmark Manager before it can run JavaScript

和this is the "bug"这已在 latest version 中解决。 last comment还指出:

javascript: is not actually ignored - they're run, but in an "empty" context that doesn't have any of the usual DOM methods you would expect, so most common uses (e.g. javascript:alert(1)) just throw (and thus are effectively ignored). javascript:1+1 works fine, though.

现在:

How do I fix this?

你不能，你必须等到他们决定找到合适的解决方案。正如评论所说，小书签可以工作，但必须明确允许。如果您只想测试代码，请使用 Firebug或新的Scratchpad功能。