\ character inside JSX text flags no-useless-escape

This bug was confirmed by @kaicataldo in babel-eslint. https://github.com/babel/babel-eslint/issues/414 Tell us about your environment

• ESLint Version: 3.6.0
• Node Version: 6.5.0
• npm Version: 3.10.3

What parser (default, Babel-ESLint, etc.) are you using? Babel

Please show your full configuration:

{
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        }
    },
    "parser": "babel-eslint",
    "rules": {
      "no-useless-escape": ["error"]
    }
}

What did you do? Please include the actual source code causing the issue.

<div>Here it is: \ </div>

What did you expect to happen? No errors

What actually happened? Please include the actual, raw output from ESLint.

error Unnecessary escape character: \ no-useless-escape

[nzakas]

@ljharb thanks for explaining, I wasn’t aware of this.

@platinumazure JSX is a separate specification from React, so its behavior is well-defined. React applies semantics on top of JSX.

Just a reminder: please be sure to include relevant information (like that the slash isn’t an escape in JSX) in bug reports. Not everyone has such context in their brains. 😃

[kellyselden]

@platinumazure OK, thank you for the heads up. I will delete my comment to get rid of the noise.