使用showdown.js转Markdown为HTML时Firefox独现OBJ神秘字符求助

Hey there! That weird Firefox-only OBJ placeholder you're seeing is super frustrating—let's break down what's going on and how to fix it.

What's Causing the OBJ Characters? #

Those unselectable "OBJ" markers are Firefox's way of rendering invisible control characters or zero-width Unicode symbols hiding in your input text. Looking at your provided content, there's a string of hidden characters right after </h2> (the "" part). Chrome and Safari handle these hidden characters quietly, but Firefox flags them with that OBJ placeholder.

Step-by-Step Fixes #

• Clean your input text first
  The easiest fix is to strip out those hidden non-printable characters. You can do this manually by enabling "show invisible characters" in your text editor (like VS Code's View > Toggle Render Whitespace option) and deleting the weird symbols. If you need to automate this, use a regex to remove control characters before passing the text to showdown:

  const cleanedText = yourOriginalText.replace(/[\x00-\x1F\x7F-\x9F\uFFFC]/g, '');
  

  The \uFFFC specifically targets the "object replacement character" that Firefox is showing as OBJ.

• Double-check showdown.js configuration
  Stick to default settings for your case, but if you're using custom extensions, verify none are introducing extra character handling that conflicts with Firefox. No special flags are needed here—just make sure hidden characters aren't being preserved accidentally.

• Validate the converted HTML
  After conversion, inspect the HTML output in Firefox's dev tools. If you still see  (the HTML entity for the object replacement character), that confirms hidden characters are still present—go back to cleaning your input.

Once you remove those hidden characters from your source text, the OBJ markers should disappear entirely in Firefox, matching the behavior in Chrome and Safari.

内容的提问来源于stack exchange，提问作者punkish