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Course Introduction：Inspired by this post where someone would want to have an active title property for only those list items that trigger the text-overflow rule on the list. So you can hover the mouse over any text that is truncated and see a tooltip of its full tex

2024-12-04 comment 0  892

Course Introduction：In web development, there are three main methods for JavaScript to obtain mouse position: 1. Use clientX and clientY to obtain the browser's visual area coordinates, which are suitable for following the cursor or judging areas; 2. Use pageX and pageY to obtain the entire page coordinates including the scrolling part, which is suitable for scenes where absolute positions are required; 3. Use offsetX and offsetY to obtain the relative position of the mouse inside the element, which is often used for canvas or hot zone detection. In addition, after obtaining the mouse coordinates, it can be used to customize the interactive functions such as cursor, drag and drop sorting, drawing tools, hover judgment and game control. Selecting the appropriate coordinate system and debugging multiple values ??can avoid confusion.

2025-07-09 comment 0  123

Course Introduction：v-on is used in Vue.js to listen for DOM events, and its abbreviation is @. Use @ to make the template more concise, such as equivalent; common usages include binding click event @click, input box change @input or @change, keyboard events such as @keyup.enter, mouse events such as @mouseover and @mouseleave; @ can also be used for components, such as subcomponents trigger events through $emit; precautions include: brackets can be omitted when no parameters are needed, written in brackets when arguments are required, modifiers such as @submit.prevent and @click.once can also be bound to multiple events at the same time.

2025-06-26 comment 0  383

Course Introduction：To handle mouse events on canvas, you need to manually monitor and judge the trigger area in combination with coordinates. 1. When obtaining the mouse position, you need to convert clientX and clientY to the internal coordinates of canvas. The formula is x=e.clientX-rect.left, y=e.clientY-rect.top; 2. If there is a zoom or transform style, the coordinates need to be adjusted accordingly; 3. To determine whether to click on the graphic, you need to record the graphics information in advance and detect whether the coordinates fall in the corresponding area when clicking; 4. To achieve the hover effect, you can listen to mousemove and clear and repaint canvas or use double buffering technology; 5. Note that the mobile terminal needs to use touch events to replace hove

2025-06-26 comment 0  640

Course Introduction：How to enable hot angles on your Mac? 1. Open the system settings and enter the "Desktop and Dock"; 2. Click the "Hot Corner" button; 3. Assign actions to each corner from the drop-down menu, such as MissionControl, desktop, screen saver, etc. Hot corners are the corners of the screen that trigger specific actions by mouse movement, suitable for quick access functions and save time. It is recommended to avoid the same diagonal setting operation when using it. Multiple monitors need to maintain consistent settings. If you frequently touch mistakes, you can set them to "none" or change corners. To turn off, just set the operation in the corresponding corner to "None".

2025-07-10 comment 0  929

Course Elementary  13746

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24578

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27436

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.