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- Why not use css framework
- The reason for not using the CSS framework is to improve the readability and maintainability of the code, improve the performance and loading speed of the web page, improve the flexibility and customizability of the code, improve your technical capabilities and learning curve, etc. Detailed introduction: 1. Improve the readability and maintainability of the code. When using a framework, you often need to read the framework's documentation and learn its specific syntax and naming rules, which makes the code more difficult to understand and modify, and manually write CSS styles. You can make the code more concise and intuitive, use familiar naming rules and comments, make the code easier to read and maintain, etc.
- Front-end Q&A 862 2023-10-10 13:22:53
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- What values does Position have?
- The values of position include static, relative, absolute, fixed, etc. Detailed introduction: 1. static static positioning is the default value of the position attribute, which means that if the position attribute is not set, the element will default to static positioning. Static positioning elements will not be specially positioned. They are arranged in the order of the document flow. Its elements are not affected by the top, right, bottom and left attributes; 2. relative positioning, etc.
- Front-end Q&A 1334 2023-10-10 11:39:32
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- What attributes does position have?
- The position attribute values include static, relative, absolute, fixed, sticky, etc. Detailed introduction: 1. static is the default value of the position attribute, which means that the elements are laid out according to the normal document flow without special positioning. The position of the elements is determined by their order in the HTML document and cannot be passed through top, right, and bottom. Adjust with the left attribute; 2. relative is relative positioning and so on.
- Front-end Q&A 1625 2023-10-10 11:18:08
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- What are front-end pseudo-elements?
- The front-end pseudo-element is a special selector in CSS that allows developers to insert additional content before or after HTML elements. Pseudo-elements are represented by using double colons. Unlike the single colon of pseudo-classes, pseudo-elements can Used to insert decorative content before or after the content of an element without adding additional markup in HTML. It is used by using a double colon after the selector in the CSS style sheet. Common pseudo-elements are before, after, first-line and first-letter.
- Front-end Q&A 1026 2023-10-09 17:22:18
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- What is the content box model?
- The content box model is a concept used to describe the layout and size of web page elements. In web design, each element is regarded as a box. This box contains content, padding, borders and margins. The content box The model defines how these properties are arranged in the box and related to each other. The content box model is very important in web design. It can help developers better control and layout web page elements. By properly setting the size of the padding and borders, you can adjust the spacing between elements and the style of the borders, thereby achieving richer and more diverse web design effects.
- Front-end Q&A 779 2023-10-09 16:26:27
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- What is the flexbox model
- Flexbox model is a CSS module for creating flexible and adaptive containers in web layouts. It provides a simple and powerful way to organize, align and distribute web elements to adapt to different screen sizes and devices. The flexible box model solves this problem by introducing two new concepts: flexible containers and flexible items. A flexible container is a parent element that contains a set of flexible items. Flexible items are child elements in the container. They are based on the container's Set to automatically resize and position itself.
- Front-end Q&A 1219 2023-10-09 16:17:15
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- What does the standard box model include?
- The standard box model includes content area, borders, padding and margins, etc. Detailed introduction: 1. The content area is the area where the element actually displays content. Its size is determined by the width and height attributes of the element; 2. The border is a line surrounding the outside of the content area to separate the content of the element from other elements. The size of the border is determined by the border-width attribute; 3. The padding is the space between the content area and the border, which is used to control the distance between the element content and the border. The size of the padding is determined by the padding attribute, etc.
- Front-end Q&A 1089 2023-10-09 16:08:14
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- What is the box model
- The box model is a way of describing the space an HTML element takes up on a page. The box model treats each HTML element as a rectangular box, which consists of four main parts: content area, padding, borders, and margins. . Detailed introduction: 1. The content area is the part of the HTML element that actually contains content, such as text, images or other nested elements. This is the core of the box model and determines the actual content displayed by the element; 2. The padding is the content area The white space between the element's border and the padding-top property in CSS.
- Front-end Q&A 1824 2023-10-09 15:50:48
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- What does position do?
- The role of position is that it can be used in scenarios such as web page layout, animation effects, map applications, and game development. Detailed introduction: 1. Web page layout, in HTML and CSS, you can use the position attribute to control the positioning of elements in the web page. Common position attribute values are static, relative, absolute and fixed; 2. Animation effects, in JavaScript, You can use the position attribute to change the position of the element to achieve animation effects and more.
- Front-end Q&A 1448 2023-10-09 13:33:48
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- What are the positioning methods of position in css?
- The positioning methods of position in CSS include static, relative, absolute, fixed and sticky. Detailed introduction: 1. static is the default value of the position attribute, which means that the positioning method of elements follows the normal document flow. Elements are laid out in the order they appear in HTML and are not affected by other positioning attributes; 2. relative The position of the element in the normal document flow is positioned by setting "top", "right", etc.
- Front-end Q&A 1811 2023-10-08 11:20:40
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- Why use position
- The reasons for using position include better controlling the layout of elements, achieving some special effects, achieving more complex effects, etc. Detailed introduction: 1. Better control the layout of elements. By setting different position values, elements can be placed at different locations on the web page. For example, if you want to place an element in the upper right corner of the web page, you can set its position attribute. Set it to "absolute" and adjust its position through the top and right attributes to achieve this layout effect and so on.
- Front-end Q&A 1160 2023-10-08 10:57:57
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- What is http status code 400?
- HTTP status code 400 means that the domain name of the page being accessed does not exist or the request is incorrect. When the request sent by the client cannot be understood or processed by the server, the server will return a 400 status code. The 400 status code usually indicates the following situations: 1. Syntax error, which cannot be understood by the server; 2. Parameter error, the request contains parameters that cannot be processed by the server; 3. Request entity error, the request entity cannot be processed by the server; 4. For security issues, the server refuses to process; 5. The server refuses the request, and the server can refuse to process the request according to its own policy.
- Front-end Q&A 10016 2023-10-07 13:36:40
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- What is http status code 200?
- http status code 200 means that the HTTP request was successful. Status code 200 belongs to the success category, indicating that the server successfully processed the client's request and returned the requested resource. Specifically, when the client sends a GET request to request a resource (such as a web page, picture, or other file), and the server successfully finds and returns the resource, the server will return status code 200. This means that the client's request has been successfully fulfilled, and the response returned contains the requested resources, etc.
- Front-end Q&A 5664 2023-10-07 13:28:38
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- How to reduce redraw and reflow in virtual DOM
- Methods for virtual DOM to reduce redrawing and reflowing: 1. Batch update, virtual DOM will record all changes and update the real DOM tree, which can avoid multiple redrawing and reflowing; 2. Diff algorithm, combine the old and new virtual DOM trees Compare the nodes, find the differences, and update the real DOM tree; 3. Batch insertion and deletion, the virtual DOM will record these operations, and then update the real DOM tree at once; 4. Avoid forced synchronization of layout and layout attributes Changes will trigger reflow, avoiding synchronized layout can reduce the number of reflows, etc.
- Front-end Q&A 1551 2023-10-07 13:20:15
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- How to avoid redraw and reflow on the front end
- Methods for the front end to avoid redrawing and reflow: 1. Use transform instead of top/left; 2. Use visibility instead of display; 3. Avoid using table layout; 4. Avoid frequent manipulation of styles; 5. Use DocumentFragment; 6. Use virtual DOM; 7. Avoid reading layout information when the layout changes; 8. Use CSS3 animation; 9. Use flex layout; 10. Avoid using too many floats, etc.
- Front-end Q&A 1538 2023-10-07 13:09:37
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