noOctalEscape

Diagnostic Category: lint/nursery/noOctalEscape

JavaScript (and super languages)

Since: v1.9.3

Sources:

Same as: no-octal-escape

Description

Disallow octal escape sequences in string literals

As of the ECMAScript 5 specification, octal escape sequences in string literals are deprecated and should not be used. Unicode escape sequences should be used instead.

Examples

Invalid

var foo = "Copyright \251";

code-block.js:1:11 lint/nursery/noOctalEscape ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Don’t use octal
  
  > 1 │ var foo = “Copyright \251”;
      │           ^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Don’t use octal escape sequences: “Copyright \251”
  
  ℹ Use unicode or hexidecimal escape sequences instead.

Valid

var foo = "Copyright \u00A9";   // unicode

var foo = "Copyright \xA9";     // hexadecimal

How to configure

{
  "linter": {
    "rules": {
      "nursery": {
        "noOctalEscape": "error"
      }
    }
  }
}