Course Introduction：The reason for building navigation using Bootstrap is that it provides a powerful, mobile-first design approach. 1) Bootstrap's mesh system and pre-built components make creating responsive layouts efficient. 2) Its huge community and detailed documentation provide strong support. 3) Use Bootstrap to quickly prototype the responsive navigation bar. 4) By adding the fixed-top class and adjusting the page fill, the problem of blocking content on the top navigation bar can be solved. 5) The drop-down menu in the navigation bar can effectively organize navigation projects and improve user experience. 6) Use CDN to optimize Bootstrap file loading to improve performance. 7) Ensure accessibility of the navigation bar and enhance disability by using ARIA attributes
2025-06-17 comment 0 275
Course Introduction：Core points Flexbox is a CSS layout model that allows developers to create complex UIs without relying on redundant CSS and JavaScript tricks. It uses a linear layout model, making it easier to layout content horizontally or vertically without spacing calculations. Flexbox can be used to create websites with giant navigation menus. This layout model allows creating simple navigation bars, single drop-down menu segments, and limiting single drop-down menu segments to three columns. The Flex layout is responsive to elements within the container, reducing the need for media queries. The final mega menu created in this tutorial is not fully responsive. The main menu bar will be displayed on a smaller screen, but the giant menu will not be available, only the top links are available
2025-02-17 comment 0 645
Course Introduction：Bootstrap navigation bar z-index issues are usually caused by improperly setting the cascaded context or position attribute. Common scenarios and solutions are as follows: 1. When the drop-down menu is blocked, set non-static positioning of the .dropdown parent and improve the z-index of .dropdown-menu to 1060; 2. When the fixed-top navigation bar is blocked, set the z-index of .navbar.fixed-top to 1030; 3. When multiple navigation elements interfere, unify the planning levels such as the main navigation 1030 and the floating toolbar 1040, and avoid abuse of z-index:9999. During troubleshooting, check whether the position attribute is effective.
2025-07-27 comment 0 337
Course Introduction：To improve the accessibility of the Bootstrap navigation bar, you need to pay attention to the following three points: 1. Use semantic labels and ARIA attributes to clarify the navigation structure and interaction status, such as wrapping the navigation bar and adding aria-label, and setting properties such as role and aria-expanded for the drop-down menu; 2. Ensure smooth navigation of the keyboard, all links and buttons can be focused through the Tab key, and support Enter or Space key operations; 3. Provide sufficient color contrast and icon text description, and use aria-label or .visually-hidden class to assist screen readers to identify content, thereby comprehensively improving the user experience of all users.
2025-07-24 comment 0 995
Course Introduction：The core method of implementing a dual-row navigation bar in Bootstrap is to combine structures and style adjustments. 1. Use nested containers to build a double-row structure, use two independent .navbars or .containers to place the top and bottom navigation content respectively, the first line places secondary information such as language switching and contact information, and the second line is used as the main menu; 2. Use Flex layout to merge into a container, set d-flexflex-column through the outer div to achieve vertical stacking, and manage styles and widths uniformly; 3. Optimization details include controlling spacing, responsive hiding the first line content, style isolation, and color matching coordination. These steps allow for a clear structure and responsive and friendly dual-line navigation bar.
2025-07-22 comment 0 750
Course Advanced 17567
Course Introduction：This course teaches you how to use html and css to create a web navigation bar + secondary drop-down menu
Course Elementary 13816
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 82347
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 13171
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 24623
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.
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