I saw how to make a dynamic tooltip using svg last night, so I learned to do it on a whim today, and I successfully made it. I also understand the principle and gained a lot! Next, I need to learn more about svg. This is a good thing.
We also paid attention to how to do some details that we usually struggle with, such as:
<article> <section id="sound1"> </section> <section id="sound2"> </section> </article>
The article tag length is 600px, the section is 300px respectively, and then set it to display:inline-block; then the following effect:
According to common sense, the avatars should be arranged horizontally. This is because display:inline-block; will render the space between the article tag and the section tag into spaces and space booths, so the images will not be in the same row. The solution is to add the following css code to the article tag and section tag:
article{ width:600px; margin:200px; font-size:0; } article section{ display:inline-block; width:300px; font-size:14px; position:relative; }
So the white space is removed!
In addition, for svg web images, we can modify them so that the image style can be modified. Its format is roughly as follows (an example):
<?xml version="1.0" encoding="utf-8"?> <!-- Generator: Adobe Illustrator 17.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) --> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="600px" height="300px" viewBox="0 0 600 300" enable-background="new 0 0 600 300" xml:space="preserve"> <polygon points="89.571,6.648 513.333,6.648 590.25,75.342 553.002,215.306 313.065,273.358 300,293.352 288.876,272.71 48.936,215.306 9.75,75.342 "/> </svg>
So it is impossible for us to introduce it into the html file. If there are many such svg images, it will be very troublesome to modify!
So I used ajax to load this image:
html dom:
// Question 2: How do we import the svg image? It is impossible to import the entire svg, which is inconvenient to modify and edit
// Tip 2: Use js to load
$('svg[data-src]').each(function(index, svg) { var src = $(svg).data('src'); //data用于获取data-*属性的路径 $.ajax({ url: src, dataType: 'xml', success: function(content) { var doc = content.documentElement; $(doc).attr({ width: $(svg).attr('width'), height: $(svg).attr('height') }); $(svg).after(doc).remove(); } }) });
There is also a good method for the stroke animation effect of pictures, only for svg images:
Use stroke-dasharray (dashed line stroke, you can keep trying to adjust it to suit the size to achieve the effect of the entire stroke) stroke-dashoffset (dashed line interval, adjust to the entire svg without stroke effect), and then Use transition to implement this animation
The final effect (as shown in the picture, there is no online demonstration, the animation effect cannot be produced, but directly copy the code posted below, and then download two svg images and avatar to use)
The code is as follows:
<!DOCTYPE html> <html lang="zh-cn"> <head> <title>toolTip聊天对话框制作</title> <meta charset="utf-8"/> <meta name="keywords" content="" /> <meta name="description" content="" /> <script type="text/javascript" src="jquery.js"></script> <style type="text/css"> h1{ color:red; font-size:18px; } article{ width:600px; margin:200px; font-size:0; } article section{ /*问题一:对于display:inline-block;会出现两个section无法并排排列,由于使用此属性会将article与section之间的空白处渲染成空格,于是无法并排*/ /*技巧一: 父元素设置 font-size:0;清除空白*/ display:inline-block; width:300px; font-size:14px; position:relative; } .text-center{ text-align:center; } #sound1,#sound2{ cursor:pointer; } #sound1 img,#sound2 img{ width:100px; height:100px; border-radius:100%; } .sound_1,.sound_2{ position:absolute; top:-104px; width:200px; height:100px; box-sizing: border-box; opacity:1; } .sound_2{ padding:28px; } .sound_1{ padding: 25px 68px 25px 30px; left: -150px; top: -134px; width: 280px; height: 140px; } .sound_1 svg ,.sound_2 svg{ position:absolute; top:0; left:0; } .sound_1 p,.sound_2 p{ position:relative; margin:0; color:#444; font-size:12px; } .sound_1 svg path, .sound_2 svg polygon{ fill:#fff;/*填充的颜色*/ stroke:red;/*描边的颜色*/ stroke-width: 6px;/*边的宽度*/ } .sound_1 svg #path1 { transform: scale(0, 0); transform-origin: center; opacity: 0; transition-duration: .3s; transition-delay: 0; } .sound_1 svg #path2 { transform: scale(0, 0); transform-origin: center; opacity: 0; transition-duration: .3s; transition-delay: .1s; } .sound_1 svg #path3 { transform: scale(0, 0); transform-origin: center; opacity: 0; transition-duration: .3s; transition-delay: .2s; } .sound_1 svg #path4 { transform: scale(0, 0); transform-origin: center; opacity: 0; transition-duration: .3s; transition-delay: .25s; } .sound_1 p { transition: .2s .35s; opacity: 0; transform: translate(0, -10px); } #sound1:hover .sound_1 svg #path1,#sound1:hover .sound_1 svg #path2,#sound1:hover .sound_1 svg #path3,#sound1:hover .sound_1 svg #path4{ transform: scale(1, 1); opacity: 1; transition-delay: 0; } #sound1:hover .sound_1 p{ opacity: 1; transform: translate(0, 0); } /*问题三:对于图片的描边动画效果,这里又怎么个好的方法,只针对svg图像*/ /*技巧三:使用stroke-dasharray(虚线描边,可以不断尝试,使其调至适应大小,实现描边的效果)stroke-dashoffset(虚线间隔,调至整个svg没有描边的效果),然后使用transition实现这个动画 */ .sound_2 svg polygon{ stroke-dasharray: 1500; stroke-dashoffset: 1500; fill-opacity: 0; transition: .6s; } .sound_2 p { transition: .4s; transform: scale(-0.5); opacity: 0; transform: translate(0, -10px); } #sound2:hover .sound_2 svg polygon{ stroke-dashoffset: 0; fill-opacity: 1; } #sound2:hover .sound_2 p { transform: scale(0); opacity: 1; transform: translate(0, 0); } </style> </head> <body> <h1 id="toolTip聊天对话框制作">toolTip聊天对话框制作</h1> <article> <section id="sound1"> <div class="text-center"><img src="/static/imghwm/default1.png" data-src="nan.jpg" class="lazy" / alt="Use svg to create dynamic tooltip_javascript techniques" ></div> <p class="text-center">韩国正太</p> <div class="sound_1"> <svg data-src="bubble1.svg" width="280" height="140"></svg> <p>听说优衣库的试衣间已全面升级,空间大小扩充一倍,精装修,同时四面都安有镜子,方便无死角录像呢,要去试一下不,美女!</p> </div> </section> <section id="sound2"> <div class="text-center"><img src="/static/imghwm/default1.png" data-src="nv.jpg" class="lazy" / alt="Use svg to create dynamic tooltip_javascript techniques" > </div> <p class="text-center">优衣库美女</p> <div class="sound_2"> <svg data-src="bubble2.svg" width="200" height="100"></svg> <p>听起来就很刺激,那走,帅哥,准备家伙,go!</p> </div> </section> </article> <script type="text/javascript"> $(document).ready(function() { // 问题二:对于svg图像我们要如何引入,不可能将整个svg都引入吧,不便于修改编辑 // 技巧二:使用js进行加载 $('svg[data-src]').each(function(index, svg) { var src = $(svg).data('src'); //data用于获取data-*属性的路径 $.ajax({ url: src, dataType: 'xml', success: function(content) { var doc = content.documentElement; $(doc).attr({ width: $(svg).attr('width'), height: $(svg).attr('height') }); $(svg).after(doc).remove(); } }) }); }) </script> </body> </html>
The above is the entire content of this article, I hope you all like it.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

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.


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