reactjs - react native : Assigning value with setState()

Question

这里，handler函数中的props名称与state中的名称相同，都是“phone”

state = {
    phone: '',
  }

.

<TextInput
          onChangeText={this.handlePhoneChange}
        />

.

handlePhoneChange = phone => {
    this.setState({phone})
  }

不应该是this.setState({phone:phone})吗？这两个陈述是同义词还是我遗漏了什么？

Answer 1

New in JavaScript with ES6/ES2015, if you want to define an object who's keys have the same name as the variables passed-in as properties, you can use the shorthand and simply pass the key name.

这是 , 的简短语法

{phone : phone}

如果键名称与变量名称相同，您可以使用它，如下所示:

{phone}

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