如何在Bootstrap中设置ScrollSpy的offset属性？

偏移量是Bootstrap Scrollspy属性，在计算滚动位置时，用户可以指定要从顶部偏移的像素。当用户感到导航栏或列表较早更改状态或在冲浪时不需要时，此功能将变得很有用。它始终是一个数字，默认值为10。可以通过JavaScript更改该值，也可以将数据偏移量值放在body标签中。

句法：

• 正常声明

  (body data-offset="")

• JavaScript声明

  $(document).ready(function(){
    $('body').scrollspy({target: " ", offset: });
  });
  

示例1：本示例描述了引导导航栏，其中使用了四个部分，并且使用JavaScript将offset属性设置为60。

  

  Bootstrap offset property
  
  
  
  
  
  
  
    
  
    body {
      position: relative;
    }
  
    #section1 {
      padding-top: 50px;
      height: 600px;
      background-color: #32CD32;
    }
  
    #section2 {
      padding-top: 50px;
      height: 600px;
      background-color: #FFFF00;
    }
  
    #section3 {
      padding-top: 50px;
      height: 600px;
      background-color: #00FF00;
    }
  
    #section4 {
      padding-top: 50px;
      height: 600px;
      background-color: #FF0000;
    }
  

  

  
    
      
        
          
          
          
        
        
          GeeksforGeeks
        
      
      
        
          
            Section 1
            Section 2
            Section 3
            Section 4
          
        
      
    
  
  
  
    Section 1
    
    
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
    
  
  
    Section 2
    
    
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
    
  
  
    Section 3
    
    
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
    
  
  
    Section 4
    
    
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
      GeeksforGeeks is a computer science
      portal. It was created with a goal
      in mind to provide well written, well
      thought and well explained solutions
      for selected questions. The core team
      of five super geeks constituting of
      technology lovers and computer science
      enthusiasts have been constantly working
      in this direction.
    
  
  
  
    $(document).ready(function () {
      $('body').scrollspy({
        target: ".navbar", offset: 50
      });
    });
  

  

输出：

示例2：该示例描述了引导列表组，其中使用了三个部分，并且body标记中的offset属性设置为15。

  

  
  
  
  Bootstrap 4 ScrollSpy
  
  
  
  
  
  
  
  
  
    
  
    body {
      position: relative;
      /* required */
    }
  
    .list-group {
      position: sticky;
      top: 20px;
    }
  

  

    
  
    Bootstrap Scrollspy
    
    
      
        
          Section One
          
          Section Two
          
          Section Three
          
        
      
      
        
          Section One
          
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction. 
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction.
          
        
        
        
          Section Two
          
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction.
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction.
          
        
        
        
          Section Three
          
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction.
            GeeksforGeeks is a computer science portal. It was created with a goal
            in mind to provide well written, well thought and well explained solutions
            for selected questions. The core team of five super geeks constituting of
            technology lovers and computer science enthusiasts have been constantly 
            working in this direction. GeeksforGeeks is a computer science portal. 
            It was created with a goal in mind to provide well written, well thought 
            and well explained solutions for selected questions. The core team of five
            super geeks constituting of technology lovers and computer science 
            enthusiasts have been constantly working in this direction.
          
        
        
      
    
  

  

输出：