How to retrieve a string in ReactIntl 2.0 without using FormattedMessage

问题

Please correct me if I am wrong, FormattedMessage in ReactIntl returns a string wrapped by span tags. In ReactIntl 1.2, we have the option to use this.getIntlMessage('key') to get only the string part.

Here is my question: Is there an equivalent of that in ReactIntl 2.0? I am aware that the string can be obtained by using the Function-As-Child pattern in FormattedMessage as

<FormattedMessage id="placeholder">
    {(formattedValue)=>(
        <MyComponent ref="mycomponent" placeholder={formattedValue}/>
    )}
</FormattedMessage>

However, it messes up the 'ref' in my component and I can't access to the component using this.refs.mycomponent any more.

回答1:

You can easily return string using intl object provided by react-intl.

this is how you use intl object inside react class in much more easier way.

note: Render Component (main component) should wrap with IntlProvider

class MySubComponent extends React.Component{
  {/*....*/}

  render(){
    return(
     <div>
        <input type="text" placeholder = {this.context.intl.formatMessage({id:"your_id", defaultMessage: "your default message"})}
     </div>

    )
  }
   }
MySubComponent.contextTypes ={
 intl:React.PropTypes.object.isRequired
}

By defining contextTypes it will enable you to use intl object which is a context type prop. See react context for more details.

回答2:

There is a better to solve placeholder problem.

<FormattedMessage ...messages.placeholderIntlText>
  {
     (msg) =>  <input type="text" placeholder = {msg} />
  }
</FormattedMessage>

回答3:

Ok, there is a work around for that. I can add ReactIntl as the context in the component like this:

contextTypes: {
    intl: React.PropTypes.object.isRequired,
},

Then when trying to retrieve the string of the message and use it, for example in a placeholder, I can do this.

<MyComponent ref="mycomponent" placeholder={this.context.intl.messages.placeholder}/>

回答4:

I solved this problem using React render props.

I created an npm package that implements it: http://g14n.info/react-intl-inject/

It is a component like this

import { injectIntl } from 'react-intl'

export default function reactIntlInject ({ children, ...props }) {
  if (typeof children === 'function') {
    return (
      children(props)
    )
  } else {
    return null
  }
}

And you can use it to wrap the components that for example has props you want to translate, for example

import React, { Component } from 'react'
// Import the package I created, available on npm with MIT license....
import InjectIntl from 'react-intl-inject'
// ...or copy the code above in a file in your project and import it, somethong like
// import InjectIntl from './path/to/my/render/prop/component'

class MyComponent extends Component {
  render () {
    return (
      <InjectIntl>
        {({ intl }) => (
          <button
            type='submit'
            value={intl.formatMessage({ id: 'enter.submit' })}
          />
        )}
      </InjectIntl>
    )
  }
}

export default injectIntl(reactIntlInject)

来源：https://stackoverflow.com/questions/35186297/how-to-retrieve-a-string-in-reactintl-2-0-without-using-formattedmessage

标签

reactjs

react-intl