unicorn/no-invalid-fetch-options Correctness ​
✅ This rule is turned on by default.
What it does ​
Disallow invalid options in fetch() and new Request(). Specifically, this rule ensures that a body is not provided when the method is GET or HEAD, as it will result in a TypeError.
Why is this bad? ​
The fetch() function throws a TypeError when the method is GET or HEAD and a body is provided. This can lead to unexpected behavior and errors in your code. By disallowing such invalid options, the rule ensures that requests are correctly configured and prevents unnecessary errors.
Examples ​
Examples of incorrect code for this rule:
javascript
const response = await fetch("/", { method: "GET", body: "foo=bar" });
const request = new Request("/", { method: "GET", body: "foo=bar" });Examples of correct code for this rule:
javascript
const response = await fetch("/", { method: "POST", body: "foo=bar" });
const request = new Request("/", { method: "POST", body: "foo=bar" });How to use ​
To enable this rule in the CLI or using the config file, you can use:
bash
oxlint --deny unicorn/no-invalid-fetch-optionsjson
{
"rules": {
"unicorn/no-invalid-fetch-options": "error"
}
}