Bug Report

🔎 Search Terms

duplicate string identifiers
duplicate keys in object

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about duplicate/keys/properties
• In the playground 3.3.3 doesn't have any support for duplicate keys and 3.5.1 has support for ids but this bug exists

⏯ Playground Link

Playground link with relevant code

💻 Code

const bar = "bar";

const a = {
    ["foo"]: 1,
    ["foo"]: 2, // Error
    [bar]: 3,
    [bar]: 4, // Not Error
};

🙁 Actual behavior

The second instance of bar is allowed.

🙂 Expected behavior

The second instance of bar as an input should not be allowed.

Additional

When you introduce bar as a key in any other form it causes the error I would expect with just the variables.

Playground link to this scenario

const bar = "bar";

const a = {
    ["foo"]: 1,
    ["foo"]: 2, // Error
    [bar]: 3,
    [bar]: 4, // Error
    bar: 5, // Error
};