# Iterator.zipKeyed() — Parameters

> iterables : An object. Each property's key is used as the key in the resulting objects. The property's value must implement either the iterable protocol or, failing that, the iterator protocol. These iterables may be infinite. Strings are rejected: to zip strings, convert them to iterators explicitl

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- Canonical URL: <https://wikikv.com/k/ref-mdn-d39a8b52895d1863d94a>
- Knowledge kind: `reference`
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- Updated: `2026-08-16T09:32:02.486586+00:00`
- Tags: `reference-seed`, `mdn`, `web`, `javascript`, `reference`, `global-objects`, `iterator`, `zipkeyed`, `parameters`

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iterables : An object. Each property's key is used as the key in the resulting objects. The property's value must implement either the iterable protocol or, failing that, the iterator protocol. These iterables may be infinite. Strings are rejected: to zip strings, convert them to iterators explicitly using {{jsxref("Iterator.from()")}}. options {{optional_inline}} : An object specifying behavior in case of inconsistent input lengths. It may have the following properties: mode {{optional_inline}} : One of the following: "shortest" (default): The resulting iterator stops when one input iterable is exhausted. "longest": The resulting iterator stops when all input iterables are exhausted. Missing values from shorter iterables are filled according to the padding option. "strict": A {{jsxref("TypeError")}} is thrown if not all input iterables finish at the same time. padding {{optional_inline}} : An object. Only retrieved and validated when mode is "longest". If undefined or absent, missing values from shorter iterables are filled with undefined (which is equivalent to passing an empty object). If an object is provided, each key of the iterables argument is retrieved _as soon as Iterator.zipKeyed() is called_. padding[key] is used for missing values for iterables[key]. If the padding object is missing some keys, those keys are filled with undefined.

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