no-dupe-keys

NOTE: this rule is part of the recommended rule set.

Enable full set in deno.json:

{
  "lint": {
    "rules": {
      "tags": ["recommended"]
    }
  }
}

Enable full set using the Deno CLI:

deno lint --rules-tags=recommended

Disallows duplicate keys in object literals.

Setting the same key multiple times in an object literal will override other assignments to that key and can cause unexpected behaviour.

Invalid:

const foo = {
  bar: "baz",
  bar: "qux",
};

const foo = {
  "bar": "baz",
  bar: "qux",
};

const foo = {
  0x1: "baz",
  1: "qux",
};

Valid:

const foo = {
  bar: "baz",
  quxx: "qux",
};

Did you find what you needed?