noDocumentCookie

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JavaScript (and super languages)

Summary

Rule available since: v1.9.4
Diagnostic Category: lint/suspicious/noDocumentCookie
This rule is recommended, which means is enabled by default.
This rule doesn’t have a fix.
The default severity of this rule is warning.
Sources:
- Same as unicorn/no-document-cookie

Description

Disallow direct assignments to document.cookie.

It’s not recommended to use document.cookie directly as it’s easy to get the string wrong. Instead, you should use the Cookie Store API.

Examples

Invalid

1
document.cookie = "foo=bar";

code-block.js:1:1 lint/suspicious/noDocumentCookie ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Direct assigning to document.cookie is not recommended.
  
  > 1 │ document.cookie = “foo=bar”;
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Consider using the Cookie Store API.

1
document.cookie += "; foo=bar";

code-block.js:1:1 lint/suspicious/noDocumentCookie ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Direct assigning to document.cookie is not recommended.
  
  > 1 │ document.cookie += ”; foo=bar”;
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Consider using the Cookie Store API.

Valid

1
const array = document.cookie.split("; ");

1
await cookieStore
2
  .set({
3
    name: "foo",
4
    value: "bar",
5
    expires: Date.now() + 24 * 60 * 60,
6
    domain: "example.com",
7
})

1
import Cookies from 'js-cookie';
2

3
Cookies.set('foo', 'bar');

How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "suspicious": {
5
        "noDocumentCookie": "error"
6
      }
7
    }
8
  }
9
}