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Collect ordered React render data seamlessly across the server and client.
Collect ordered React render data seamlessly across the server and client.
Note While digital trees are cool, climate change is negatively impacting real trees at a rapid rate. Please consider planting a tree, starting a garden, or donating to an organization.
npm install reforest
yarn add reforest
When building low-level components in React for accessibility, styling, and animation purposes, the orchestration for everything can become painful for both the library author and consumer. In general, the problem boils down to a component needing to use render data from another component[s]. This library aims to solve this problem by managing a tree of data built from other component renders in an easy API that works on the server and client.
use-indexed-children (predecessor)
Warning The API is still in development and may change without notice. Docs coming soon..
Please note the following example is for demo purposes only and you should use a more robust solution that is fully accessible.
import * as React from "react"
import { useTree, useTreeNode } from "reforest"
const SelectContext = React.createContext<any>(null)
function Select({ children }: { children: React.ReactNode }) {
const highlightedIndexState = React.useState<number | null>(null)
const [highlightedIndex, setHighlightedIndex] = highlightedIndexState
const [selectedValue, setSelectedValue] = React.useState<React.ReactElement | null>(null)
const tree = useTree(children)
const moveHighlightedIndex = (amountToMove: number) => {
setHighlightedIndex((currentIndex) => {
if (currentIndex === null) {
return 0
} else {
const nextIndex = currentIndex + amountToMove
if (nextIndex >= tree.maxIndex) {
return 0
} else if (nextIndex < 0) {
return maxIndex - 1
}
return currentIndex + amountToMove
}
})
}
return (
<div
tabIndex={0}
onKeyDown={(event) => {
if (event.key === "ArrowUp") {
moveHighlightedIndex(-1)
} else if (event.key === "ArrowDown") {
moveHighlightedIndex(1)
}
}}
>
<strong>{selectedValue ? <>Selected: {selectedValue}</> : `Select an option below`}</strong>
<SelectContext.Provider value={{ highlightedIndexState, selectedValue }}>
{indexedChildren}
</SelectContext.Provider>
</div>
)
}
function Option({ children, value }: { children: React.ReactNode; value: any }) {
const { indexPath, index } = useTreeNode()
const selectContext = React.useContext(SelectContext)
const [highlightedIndex, setHighlightedIndex] = selectContext.highlightedIndexState
const isHighlighted = index === highlightedIndex
const isSelected = selectContext.selectedValue ? selectContext.selectedValue === value : false
return (
<div
onMouseOver={() => setHighlightedIndex(index)}
onMouseOut={() => setHighlightedIndex(null)}
onClick={() => selectContext.selectIndex(indexPath)}
style={{ backgroundColor: isHighlighted ? "yellow" : "white" }}
>
{children} {isSelected && "✅"}
</div>
)
}
const fruits = ["Apple", "Orange", "Pear", "Kiwi", "Banana", "Mango"]
export default function App() {
return (
<Select>
{fruits.map((fruit) => (
<Option key={fruit} value={fruit}>
{fruit}
</Option>
))}
</Select>
)
}
FAQs
Collect ordered React render data seamlessly across the server and client.
We found that reforest demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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