ui-js-components-text.md

# Text

Text是文本组件，用于呈现一段文本信息。具体用法请参考[Text API](../reference/arkui-js/js-components-basic-text.md)。


## 创建Text组件

在pages/index目录下的hml文件中创建一个Text组件。

```
<!-- xxx.hml -->
<div class="container" style="text-align: center;justify-content: center; align-items: center;">
  <text>        Hello World    </text>
</div>
```

```
/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #F1F3F5;
}
```

![zh-cn_image_0000001211383427](figures/zh-cn_image_0000001211383427.png)


## 设置Text组件样式和属性

- 添加文本样式


    设置color、font-size、allow-scale、word-spacing、text-valign属性分别为文本添加颜色、大小、缩放、文本之间的间距和文本在垂直方向的对齐方式。 

```
<!-- xxx.hml -->
<div class="container" style="background-color:#F1F3F5;flex-direction: column;justify-content: center; align-items: center;">   
  <text style="color: blueviolet; font-size: 40px; allow-scale:true"> 
    This is a passage
  </text>
  <text style="color: blueviolet; font-size: 40px; margin-top: 20px; allow-scale:true;word-spacing: 20px;" >
    This is a passage
  </text>
</div> 
```

```
/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #F1F3F5;
}
```


 ![zh-cn_image_0000001220778205](figures/zh-cn_image_0000001220778205.png)


- 添加划线

​    设置text-decoration和text-decoration-colo属性为文本添加划线和划线颜色，text-decoration枚举值请参考    Text自有样式。


    <!-- xxx.hml -->
    <div class="container" style="background-color:#F1F3F5;">
      <text style="text-decoration:underline">
        This is a passage
      </text>
      <text style="text-decoration:line-through;text-decoration-color: red">
        This is a passage
       </text>
    </div>
```
/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
text{
  font-size: 50px;
}
```

  ![zh-cn_image_0000001220856725](figures/zh-cn_image_0000001220856725.png)


- 隐藏文本内容

  当文本内容过多而显示不全时，添加text-overflow属性将隐藏内容以省略号的形式展现

```
<!-- xxx.hml -->
<div class="container">
  <text class="text">
    This is a passage
  </text>
</div>
```

    /* xxx.css */
    .container {
      width: 100%;
      height: 100%;
      flex-direction: column;
      align-items: center;
      background-color: #F1F3F5;
      justify-content: center; 
    }
    .text{
      width: 200px;
      max-lines: 1;
      text-overflow:ellipsis;
    }

 **说明：**

-  text-overflow样式需要与max-lines样式配套使用，设置了最大行数的情况下生效。
- max-lines属性设置文本最多可以展示的行数。


​    ![zh-cn_image_0000001163656706](figures/zh-cn_image_0000001163656706.png)


- 设置文本折行

​      设置word-break属性对文本内容做断行处理，word-break枚举值请参考Text自有样式。

```
<!-- xxx.hml -->
<div class="container">
  <div class="content">
    <text class="text1">
      Welcome to the world
    </text>
      <text class="text2">
        Welcome to the world
      </text>
  </div>
</div
```


    /* xxx.css */
    .container {
      background-color: #F1F3F5;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .content{
      width: 50%;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .text1{
      height: 200px;
      border:1px solid #1a1919;
      margin-bottom: 50px;
      text-align: center;
      word-break: break-word;
      font-size: 40px;
    }
    .text2{
      height: 200px;
      border:1px solid #0931e8;
      text-align: center;
      word-break: break-all;
      font-size: 40px;
    }


​    ![zh-cn_image_0000001209033195](figures/zh-cn_image_0000001209033195.png)


- Text组件支持[Span](../reference/arkui-js/js-components-basic-span.md)子组件

  
    ```
    <!-- xxx.hml -->
    <div class="container" style="justify-content: center; align-items: center;flex-direction: column;background-color: #F1F3F5;  width: 100%;height: 100%;">
      <text style="font-size: 45px;">
        This is a passage
      </text>
      <text style="font-size: 45px;">
        <span style="color: aqua;">This </span><span style="color: #F1F3F5;">      1       
        </span>   
        <span style="color: blue;"> is a </span>    <span style="color: #F1F3F5;">      1    </span>    
        <span style="color: red;">  passage </span>
      </text>
    </div>
    ```
    
    
    ![zh-cn_image_0000001163372568](figures/zh-cn_image_0000001163372568.png)
    
    
    > ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
    > - 当使用Span子组件组成文本段落时，如果Span属性样式异常（例如：font-weight设置为1000），将导致文本段落显示异常。
    > 
    > - 在使用Span子组件时，注意Text组件内不能存在文本内容，如果存在文本内容也只会显示子组件Span里的内容。
    

## 场景示例

Text组件通过数据绑定展示文本内容，Span组件通过设置show属性来实现文本内容的隐藏和显示。

```
<!-- xxx.hml -->
<div class="container">
  <div style="align-items: center;justify-content: center;">
    <text class="title">
      {{ content }}
    </text>
    <switch checked="true" onchange="test"></switch>
  </div>
  <text class="span-container" style="color: #ff00ff;">
    <span show="{{isShow}}">  {{ content  }}  </span>
    <span style="color: white;">
        1
    </span>
    <span style="color: #f76160">Hide clip </span>
  </text>
</div>
```

```
/* xxx.css */
.container {
  width: 100%;
  height: 100%;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  background-color: #F1F3F5;
}
.title {
  font-size: 26px;
  text-align:center;
  width: 200px;
  height: 200px;
}
```

```
// xxx.js
export default {   
  data: {    
    isShow:true,    
    content: 'Hello World'
  },   
  onInit(){    },  
  test(e) {    
    this.isShow = e.checked  
  }
}
```

![zh-cn_image_0000001208636379](figures/zh-cn_image_0000001208636379.gif)