How to annotate code in react native

How to comment code in react native: 1. Within the HTML tag node, use "{/* */}" to comment; 2. Outside the HTML tag node, use "/**/" to comment, a single line can be commented with "//".

The operating environment of this tutorial: windows7 system, react native0.6&&react16 version, this method is applicable Suitable for all brands of computers.

Recommended related tutorials: React video tutorial

React Native comments are too particular, errors are reported frequently, and they are not smart. Here is a summary of the comments .

Problem presentation

The code is as follows:

        //标题栏
        ① <View style = {styles.container}>
            ②<View style = {styles.headerView}><Text style = {styles.textHeaderStyle}>Header</Text>
            </View>
          //Tab栏
          <ScrollableTabView
              style={styles.pagerView}
              renderTabBar={() => <DefaultTabBar />}//默认样式，Tab栏不可滑动
              tabBarUnderlineStyle={styles.lineStyle}//下划线
              tabBarActiveTextColor='#FF0000'>         

          <MyFlatList  //列表项
            tabLabel = {dataSource1.tab}
            dataSource = {dataSource1}
            renderItem = {({item}) =>
            <TouchableNativeFeedback    //点击事件
                onPress = {this.onPress.bind(this,item)}>
                <Text style = {styles.textMainStyle}>{item.key}</Text>
            </TouchableNativeFeedback>
          }
          />

It runs normally before adding comments. After adding comments, various reports are reported. Error.
It’s very strange. After investigation, we found:

>. Please note that when using // as a comment, the comment content must not be in any html tag, otherwise it will be regarded as the text content to be displayed.

For example, although the //Tab bar above is outside ②, it is still inside ①. It will be regarded as the text to be displayed, and an error will be reported. At this time, the comment should be {/* General comment , surrounded by {}" for multiple lines */}

#react native uses JSX language, combining JS and html. All comments are as follows:

var content = (
  <Nav>
    {/* 一般注释, 用 {} 包围 */}
    <Person
      /* 多
         行
         注释 */
      name={window.isLoggedIn ? window.name : &#39;&#39;} // 行尾注释
    />
  </Nav>
);

Add comments in JSX Easily they are just JS expressions. You just need to surround the part to be commented with {} within the child nodes of a tag (not the outermost).

class ReactDemo extends Component {
  render() {
    return (      <View style={styles.container}>
        {/*标签子节点的注释*/}
        <Text style={styles.welcome}
          //textAlign=&#39;right&#39;
          textShadowColor=&#39;yellow&#39;
          /*color=&#39;red&#39;
          textShadowRadius=&#39;1&#39;*/
          >
          React Native!        </Text>
      </View>
    );
  }
}

Comment outside the tag node and The usual comments are the same, use "/**/", use "//" for a single line.

Note:

When using // as a comment, please note that the comment content must not be in any html tag, otherwise it will be regarded as The text content to be displayed

comments are generally {/**/} for multiple lines. If it is not within any tag, you can use //, } followed by comments //

More programming related knowledge, Please visit: Introduction to Programming! !

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