如何在 Bootstrap 中手风琴式滚动到顶部打开内容？
原文:https://www . geeksforgeeks . org/how-follow-follow-to-top-to-open-content-in-bootstrap/
Bootstrap 手风琴在实际操作中非常吸引人，但是当手风琴上下文元素非常大时，就很难获得活动的手风琴顶部。但是在这里，您将学习如何在几行 JavaScript 代码的帮助下实现这一功能。在这里，我们将使用 scrolltop 属性来实现手风琴中的功能。
语法:
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它返回 scrollTop 属性。
html element.scrollTop -
用于设置滚动顶部属性
html element.scrollTop = value
示例:
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JavaScript 代码:你所要做的就是创建一个普通的 Bootstrap Accordion 并粘贴下面的 JavaScript 代码 int script 标签，然后动作就开始了。
```html $('#accordion').on('shown.bs.collapse', function () {
var panel = $(this).find('.in');
$('html, body').animate({ scrollTop: panel.offset().top }, 500);
}); ```
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程序:
```html <!DOCTYPE html>
Accordion scroll to open content $('#accordion').on('shown.bs.collapse', function() {var panel = $(this).find('.in');
$('html, body').animate({ scrollTop: panel.offset().top }, 500);
});
GeeksforGeeks
Either you love it or hate it, but in the age of Microservice and REST API, you can not ignore JavaScript. JavaScript was once upon a time used only in client side(browser), but node js (execution engine/run time/web server) have made possible to run javascript on server side. JavaScript is everywhere – on Desktop/Server/Mobile.You can create mobile web app with javascript and html5, which has lot of advantages like save licensing cost $99 yearly to pay Apple or making IOS apps and you don’t have to purchase MAC laptop to make your IOS app(Apple’s app can only be made in MAC). JavaScript has stormed the web technology and nowadays small software ventures to fortune 500, all are using node js for web apps. Recently wordpress.com has rewritten its dashboard in javascript, paypal also chose to rewrite some of its components in javascript. Be it google/twitter/facebook, javascript is important for everyone. It is used in applications like single-page applications, Geolocation APIs, net advertisements, etc. However JavaScript is quirky/dynamic/scripting/ functional oriented language, and it has its own idiosyncrasies. It is not scalable, it is good for some 3000 line of code but for a bigger app, it becomes difficult to manage, read and debug. Also, not everyone is very much familiar to JavaScript. You might sometimes think that I do not know much of a JavaScript then “How to be JavaScript Developer without much knowledge of JavaScript?” To ease down our work, some smart developers/companies have made compiler/transpiler which converts your other language code into javascript code. (Best of both worlds) C++: If you know C++, then it is possible to get it converted into JavaScript. Cheerp is a free compiler for open-source commercial projects as well as for closed source non commercial projects.It is the C++ compiler for the web.You just write a web application or port your existing one, all in C++. Cheerp will generate its JavaScript code that can run on any browser. Java: Java is a darling of open source, backed by Oracle /IBM/Google/Red hat. A maximum number of developers in the world are Java developers (around 10 million). Maximum number of projects in github and apache are based on Java.
Python is a widely used general-purpose, high level programming language. It was initially designed by Guido van Rossum in 1991 and developed by Python Software Foundation. It was mainly developed for emphasis on code readability, and its syntax allows programmers to express concepts in fewer lines of code. Python is a programming language that lets you work quickly and integrate systems more efficiently. There are two major Python versions- Python 2 and Python 3. Both are quite different. Beginning with Python programming: 1) Finding an Interpreter: Before we start Python programming, we need to have an interpreter to interpret and run our programs. There are certain online interpreters like https: //ide.geeksforgeeks.org/, http://ideone.com/ or http://codepad.org/ that can be used to start Python without installing an interpreter. Windows:There are many interpreters available freely to run Python scripts like IDLE ( Integrated Development Environment) which is installed when you install the python software from http: //python.org/ Linux: For Linux, Python comes bundled with the linux.
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输出:
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