How to set default values on imported components in REACT

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Lets say I am using a <FormattedNumber > that I am importing from react-intl

It has a property called minimumSignificantDigits, so that if I set it all my numbers look awesome like 1.00... great when you are working with currencies.. so I can use it like this: <FormattedNumber minimumSignificantDigits={3} value={somevar}>

I have about 100 of these on the page and I don't want to keep setting this minimumSignificantDigits property on every single on of them, and then when the client changes his/her mind I have to update all of them.

Is there any way that I can set/override some default properties on that component when I import it.

Obviously yes, make a wrapper around <FormattedNumber>

// TreeCharFormattedNumber.jsx
export default TreeCharFormattedNumber = ({ value }) => (
  <FormattedNumber  minimumSignificantDigits={3} value={value}>>
);

// YourComponent.jsx
import TreeCharFormattedNumber from "./TreeCharFormattedNumber";
...
<div>
   <TreeCharFormattedNumber value={myAwsomeValue} />
</div>
...

You can also put TreeCharFormattedNumber in the same file leaving export default

How to conditionally set default props on React components, The defaultProps object on React components doesn't have access to this.props Default props work great when the same default value can be used for every instance of the component. import ReactDOM from 'react-dom' I use the code below to set default props on a React component but it doesn't work. In the render() method, I can see the output "undefined props" was printed on the browser console. How can I define a default value for the component props?

Wrap the imported component with another.

In this example, the default value for minimumSignificantDigits would be 3 with any other props passed through as is. (This allows you to also override your default on a per component basis if required)

function FormattedNumberWithDefault(props) {
    return (
       <FormattedNumber minimumSignificantDigits={3} {...props}>
    )
}

A complete guide to default props in React, You can tweak the component a bit to use a default value for the version prop whenever it is A default value of 16 has been set for the version prop. import React from 'react'; /** * ThemedButton Component * Using React. There is sometimes a need when we want to specify a default value for properties of components just in case we forget to pass the values to the properties. Let’s continue with this example where we have created a Comments component ad passed values in the properties.

Wrap it with your own component:

export const MyFormattedNumber = (props) => (
    <FormattedNumber minimumSignificantDigits={3} {...props}>
);

Now you can import it whenever it's needed, and everything you'll pass to MyFormattedNumber will be passed to the wrapped FormattedNumber:

<MyFormattedNumber value={3} />

You can easily override the default if you pass the property minimumSignificantDigits, because spreading the props can replace the default prop as well:

<MyFormattedNumber minimumSignificantDigits={15} value={somevar}>

Set default values for Props in ReactJS Components – Microsoft , Set default values for Props in ReactJS Components import ReactDOM from '​react-dom';. import { Comment } from 'semantic-ui-react';. import  For a React component created using the ES6 class syntax, you can set default props by adding a static property named defaultProps to the component class. The defaultProps static property should be set to an object representing the default props for the component.

I have found that the following also works:

import React from 'react'
import {FormattedNumber} from 'react-intl'
import {Link} from 'react-router-dom'

FormattedNumber.defaultProps = {
  style: 'decimal', 
  minimumFractionDigits: 2,
  maximumFractionDigits: 2,
}

Understanding React Default Props, In this article, we saw ways to set default values for the props argument in our React components be it ES6 class or functional component. This is  Be aware of the difference between default and named exports. It is a common source of mistakes. We suggest that you stick to using default imports and exports when a module only exports a single thing (for example, a component). That’s what you get when you use export default Button and import Button from './Button'.

Improving Component Consumption with Defaults, Default prop values allow us to improve the consumption experience of In this post, we refactor an existing React TextAreaField component, to make it import React, { FC, ChangeEvent } from "react"; interface IProps { id:  The defaultProps will be used to ensure that this.props.name will have a value if it was not specified by the parent component. The propTypes typechecking happens after defaultProps are resolved, so typechecking will also apply to the defaultProps. Edit for clarity: There should be no need for you setMessage in this instance.

How To Use Default Properties In React.js, But did you know that in React you can define the default properties? import React from 'react'; let Panel = React. So we need to provide a default value for didYouKnowThat property in case a parent component forgets to do so. To do this  I just went through this myself and chose to set the default value at the reducer INIT function. If you bind your select with redux then best not 'de-bind' it with a select default value that doesn't represent the actual value, instead set the value when you initialize the object.

Typechecking With PropTypes – React, To run typechecking on the props for a component, you can assign the special propTypes property: import PropTypes from 'prop-types'; class Greeting extends React. You can define default values for your props by assigning to the special​  As you have seen, props enable you to pass variables from one to another component down the component tree. In the previous example, it was only a string variable. But props can be anything from integers over objects to arrays. Even React components, but you will learn about this later. You can also define the props inline. In case of strings