react-intl cosnt< FormattedMessage/>正在给[object object]作为结果 [英] React-intl cosnt <FormattedMessage /> is giving [object object] as result

问题描述

我正在使用"react-intl":"^ 2.4.0"和"react":"^ 16.2.0".

I am using "react-intl": "^2.4.0", and "react": "^16.2.0".

我正在尝试将FormattedMessage标签的输出分配给一个常量，并将其放在输入标签的占位符中.

I am trying to assign the output of FormattedMessage tag to a constant and put it in the input tag placeholder.

代码图像

预期的输出输入"字段，其中包含使用相应语言的文本，但该字段正在[对象对象]出现在文本框中.

Expected Output Input field with text in the respective language in it but it is coming [object object] inside the text box.

推荐答案

<FormattedMessage />是无法放置在需要原始字符串的placeholder上的组件.

<FormattedMessage /> is a component which cannot be placed to placeholder which expects a raw String.

import {injectIntl} from 'react-intl'; 

class TestComponent extends React.Component{
  render(){
    const { intl } = this.props;
    return (
        <input placeholder={intl.formatMessage({ id: "loginPage.username", defaultMessage: 'username'})}/>
    )
  }
}

export default injectIntl(TestComponent);

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