# Lazy Loading closures > * 如有錯誤處指正或任何建議，懇請留言，感謝! > * 搭配 ChatGPT 進行翻譯，請小心服用 > * ▸ ... 為英文原文 :::spoiler ... A closure can be converted into a lazy-loaded reference using the `$()` function. This generates a `QRL<Function>` type. A QRL is a lazy-loadable reference of the closure. In our case, we have extracted the closure associated with the `onInput` event into the component body. Because it is no longer inlined we need to change how the JSX refers to it from `onInput$` to `onInputQrl`. Notice that our closure closes over the `store` that is captured by the Optimizer and then restored as needed. ### Example In this example, we would like to demonstrate how easy it is to lazy-load behavior in Qwik. Let's lazy load the code that is executed when the `Enter` key is pressed. Wrap the code associated with `Enter` with `$()` to mark it for lazy loading. The resulting `QRL<()=>void>` can then be lazy-invoked with `.invoke()` and the result can be awaited with `await` keyword. Look at the `Symbols` tab to see how the code was broken up into pieces. ::: ###### tags: `$ and QRL`