Google Chrome控制台日志字符串末尾的箭头字符是什么？附截图求助

Hey there! That little arrow-like character hanging off the end of strings like phone in your Chrome console is almost certainly a Unicode control character—the sneaky kind that doesn't show up as regular readable text but can sneak into your strings and trigger that visual indicator in the console. Let's break down what it is and how to deal with it:

• Most likely culprits: The Right-to-Left Mark (RLM, U+200F) or Left-to-Right Mark (LRM, U+200E)
  These tiny control characters are meant to adjust text direction for multi-language content (think mixing English with Arabic/Hebrew). But they often get accidentally stuck in strings—like when copying text from a RTL-enabled document, or if your backend API returns content that includes them as part of localization handling. Chrome's console displays them as small arrows to alert you that an invisible control character is present.

• How to confirm its exact identity:
  You can dig into the character's Unicode code right from the console with a quick snippet:

  // Replace 'yourString' with the actual string from your logs
  const yourString = "phone" + String.fromCharCode(0x200F); // Example with RLM
  // Loop through each character and log its code
  [...yourString].forEach(char => {
    console.log(`Character: ${char}, Unicode hex: ${char.charCodeAt(0).toString(16)}`);
  });
  

  Run this, and the arrow character will spit out its hex code—RLM is 200f, LRM is 200e, and if it's a zero-width space (another common invisible character), you'll see 200b.

• Why did it get there in the first place?
  Common scenarios include:

  • Copy-pasting text from a website or document that uses RTL text direction
  • Backend services adding direction marks when processing multi-language content
  • Accidental inclusion in string concatenation or parsing logic in your frontend code

• How to get rid of it:
  If you don't need the control character, a simple regex can strip out these common invisible culprits:

  const cleanedString = yourString.replace(/[\u200E\u200F\u200B]/g, '');
  

内容的提问来源于stack exchange，提问作者user605505