Sending common parameters to a React functional component within a TypeScript definition file

Question

Sending common parameters to a React functional component within a TypeScript definition file

Currently, I am working on defining types in a .d.ts file for a React.FunctionComponent, specifically for a component called Tree with the following props:

Tree.propTypes = {
  root: PropTypes.object.isRequired,
  children: PropTypes.func,
  top: PropTypes.number,
  left: PropTypes.number,
  className: PropTypes.string,
  size: PropTypes.arrayOf(PropTypes.number),
  nodeSize: PropTypes.arrayOf(PropTypes.number),
  separation: PropTypes.func,
  linkComponent: PropTypes.any,
  nodeComponent: PropTypes.any
};

export default function Tree({
  top,
  left,
  className,
  root,
  size,
  nodeSize,
  separation,
  children,
  linkComponent = DefaultLink,
  nodeComponent = DefaultNode,
  ...restProps
}) {

I have also imported necessary dependencies from 'd3-hierarchy' for my implementation:

import React from 'react';
import { TreeLayout, HierarchyPointNode, HierarchyNode } from 'd3-hierarchy';</p>

<p>My proposed approach involves defining the TreeProps interface and a corresponding function that takes the specified type arguments:</p>

<pre><code>export interface TreeProps<Datum, LinkComponentType = any, NodeComponentType = any> {
  root: HierarchyNode<Datum>;
  top?: number;
  left?: number;
  className?: string;
  size?: [number, number];
  linkComponent: React.ComponentType<LinkComponentType>;
  separation: (a: HierarchyPointNode<Datum>, b: HierarchyPointNode<Datum>) => number;
  nodeComponent: React.ComponentType<NodeComponentType>;
  nodeSize?: [number, number];
}


export declare function Tree<
  Datum,
  LinkComponentType = any,
  NodeComponentType = any
>(args: TreeProps<Datum, LinkComponentType, NodeComponentType>): JSX.Element;

While considering using React.FunctionComponent for typing, it presents some challenges as passing type arguments becomes restricted. Hence, the current approach seems more suitable for this scenario.

typescript

Answer 1

Answer №1

If you want to define a module in a .d.ts file, you can do so in the following way:

declare module 'NAME_OF_THE_PACKAGE' {
    export interface TreeProps<Datum, LinkComponentType = any, NodeComponentType = any> {
        root: HierarchyNode<Datum>;
        top?: number;
        left?: number;
        className?: string;
        size?: [number, number];
        linkComponent: React.ComponentType<LinkComponentType>;
        separation: (a: HierarchyPointNode<Datum>, b: HierarchyPointNode<Datum>) => number;
        nodeComponent: React.ComponentType<NodeComponentType>;
        nodeSize?: [number, number];
    }

    export function Tree<Datum, LinkComponentType = any, NodeComponentType = any>(
        args: TreeProps<Datum, LinkComponentType, NodeComponentType>
    ): JSX.Element;
}

In the above code snippet, make sure to replace NAME_OF_THE_PACKAGE with the exact name of the package you are importing or installing via npm or yarn.

To use the TreeProps and Tree, you can import them like this:

import { TreeProps, Tree } from 'NAME_OF_THE_PACKAGE'

For further information on modules, you can refer to this resource (specifically look into the example on how to declare JavaScript libraries - "Working with Other JavaScript Libraries").

Answer 2

If you want to define a module in a .d.ts file, you can do so in the following way:

declare module 'NAME_OF_THE_PACKAGE' {
    export interface TreeProps<Datum, LinkComponentType = any, NodeComponentType = any> {
        root: HierarchyNode<Datum>;
        top?: number;
        left?: number;
        className?: string;
        size?: [number, number];
        linkComponent: React.ComponentType<LinkComponentType>;
        separation: (a: HierarchyPointNode<Datum>, b: HierarchyPointNode<Datum>) => number;
        nodeComponent: React.ComponentType<NodeComponentType>;
        nodeSize?: [number, number];
    }

    export function Tree<Datum, LinkComponentType = any, NodeComponentType = any>(
        args: TreeProps<Datum, LinkComponentType, NodeComponentType>
    ): JSX.Element;
}

In the above code snippet, make sure to replace NAME_OF_THE_PACKAGE with the exact name of the package you are importing or installing via npm or yarn.

To use the TreeProps and Tree, you can import them like this:

import { TreeProps, Tree } from 'NAME_OF_THE_PACKAGE'

For further information on modules, you can refer to this resource (specifically look into the example on how to declare JavaScript libraries - "Working with Other JavaScript Libraries").

Answer 3

Answer №2

To define a type, follow this format

export type Tree<D, LC = any, NC = any> =
    React.FunctionComponent<TreeProps<D, LC, NC>> => JSX.Element

Example of Usage

const Tree: Tree<a,b,c> = (props) => <></>

Answer 4

To define a type, follow this format

export type Tree<D, LC = any, NC = any> =
    React.FunctionComponent<TreeProps<D, LC, NC>> => JSX.Element

Example of Usage

const Tree: Tree<a,b,c> = (props) => <></>

Answer 5

Answer №3

If you want to create a function component in React, you can define it like this:

declare const Tree: React.FunctionComponent<TreeProps<Datum, LinkComponentType, NodeComponentType>>;

export default Tree;

The Tree component will have the type of React.FunctionComponent<P>, which is essentially a function that takes props and context as arguments and returns a React element or null.

You might be wondering about the use of the declare keyword in this context. You can find a helpful explanation here.

To create a function component with the type React.FunctionComponent<P>, you don't need to include the declare keyword. Simply write it like this:

const Tree: React.FunctionComponent<TreeProps<Datum, LinkComponentType, NodeComponentType>> =
(props) => {
    return <div className={props.className}>
        Some div
        </div>
}

Just remember that there's no need for the declare keyword when creating a function component in this way.

Answer 6

If you want to create a function component in React, you can define it like this:

declare const Tree: React.FunctionComponent<TreeProps<Datum, LinkComponentType, NodeComponentType>>;

export default Tree;

The Tree component will have the type of React.FunctionComponent<P>, which is essentially a function that takes props and context as arguments and returns a React element or null.

You might be wondering about the use of the declare keyword in this context. You can find a helpful explanation here.

To create a function component with the type React.FunctionComponent<P>, you don't need to include the declare keyword. Simply write it like this:

const Tree: React.FunctionComponent<TreeProps<Datum, LinkComponentType, NodeComponentType>> =
(props) => {
    return <div className={props.className}>
        Some div
        </div>
}

Just remember that there's no need for the declare keyword when creating a function component in this way.

Sending common parameters to a React functional component within a TypeScript definition file

Answer №1

Answer №2

Answer №3

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