Angualr中通过原生js和ViewChild的方式获取dom

古城微笑少年丶 2023-10-07 14:03 22阅读 0赞

## 场景 ##

Angular介绍、安装Angular Cli、创建Angular项目入门教程：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/105570017][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_105570017]

Angular新建组件以及组件之间的调用：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/105694997][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_105694997]

通过以上搭建起Angular项目。

注：

博客：  
[https://blog.csdn.net/badao\_liumang\_qizhi][https_blog.csdn.net_badao_liumang_qizhi]  
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## 实现 ##

然后新建一个slide组件,在组件的html中添加一个div并添加id属性

<div id="myBox">
      这是一个div
    </div>

### 原生JS获取dom ###

然后在对应的ts中添加声明周期方法ngAfterViewInit()

不能在ngOnInit()方法中获取dom

ngAfterViewInit(): void {
        //原生js获取dom
        let mybox:any = document.getElementById('myBox');
        console.log(mybox);
        mybox.style.background = 'red';
      }

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

### 使用ViewChild获取dom ###

首先在组件的html中新增一个div 并通过\#提添加id

<div #myBox2>
        这是一个div--myBox2
    </div>

然后在此组件对应的ts中引入ViewChild

import { Component, OnInit,ViewChild } from '@angular/core' ;

并且通过

@ViewChild('myBox2') myBox:any;

获取dom元素

其中myBox2要与html的id属性相对应，后面的myBox自己定义。

然后在ngAfterViewInit()生命函数中

ngAfterViewInit(): void {
    
        //通过viewChild获取dom
        this.myBox.nativeElement.style.color = "red";
      }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2][]

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_105570017]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/105570017
[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_105694997]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/105694997
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
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