


In WEB development, users are asked to copy a piece of code, URL address and other information on the page. In order to avoid possible errors when the user drags the mouse and then right-clicks to copy, we can directly place a copy button on the page. Just click on this copy button, the content will be copied, and then the user can paste where they want to paste.
HTML
First, you need to load the jquery library and zclip plug-in into the page. These two files have been packaged. You are welcome to click to download.
<script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript" src="js/jquery.zclip.min.js"></script>
Then we add the following code to the body part of the page:
<textarea id="mytext">请输入内容</textarea><br/> <a href="#" id="copy_input" class="copy">复制内容</a>
An input box textarea is placed on the page. Of course it can also be other html elements, and then there is a copy button, which can also be in the form of link text.
Javascript
When "Copy Content" is clicked, the zclip plug-in is called and the copy is successful. Please see the code:
$(function(){ $('#copy_input').zclip({ path: 'js/ZeroClipboard.swf', copy: function(){//复制内容 return $('#mytext').val(); }, afterCopy: function(){//复制成功 $("<span id='msg'/>").insertAfter($('#copy_input')).text('复制成功'); } }); });
It is worth noting that if the copied content comes from input box input, textarea, etc., use the copy object:
copy: function(){ return $('#mytext').val(); }
If the copied content comes from page elements div, p, etc., use the copy object:
copy: $('#mytext').text();
This completes the function of copying content to the clipboard.
Parameter description
path: swf calling path, required, such as js/ZeroClipboard.swf, the ZeroClipboard.swf file already exists in the download package.
copy: The copied content must be any string, or it can be the content returned by the callback function
beforeCopy: callback function before copying content, optional
afterCopy: callback function after copying content, optional
The above is the entire content of this article, I hope you all like it.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base


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