Gathering sand into a tower, making a little progress every day
⭐ Column introduction
Front-end entry journey: Explore the wonderful world of web development. Remember to click on the link above or on the right to subscribe to this column. Geometry will take you on a front-end journey.
Welcome to the front-end entry journey! This column is tailor-made for those who are interested in web development and have just entered the front-end field. Whether you are a complete novice or a developer with some basic knowledge, here will provide you with a systematic and friendly learning platform. In this column, we will update it every day in the form of questions and answers, presenting you with selected front-end knowledge points and answers to frequently asked questions. Through the Q&A format, we hope to respond more directly to readers’ questions about front-end technology and help everyone gradually establish a solid foundation. Whether it's HTML, CSS, JavaScript, or various common frameworks and tools, we'll explain concepts in a simple and easy-to-understand way, and provide practical examples and exercises to solidify what you've learned. At the same time, we will also share some practical tips and best practices to help you better understand and apply various technologies in front-end development.
Not only that, we will also regularly launch some practical project tutorials so that you can apply the knowledge you have learned to actual development. Through the practice of actual projects, you will be able to better understand the workflow and methodology of front-end development, and develop your own ability to solve problems and develop independently. We believe that only by continuous accumulation and practice can we truly master front-end development technology. So, get ready for the challenge and bravely embark on this front-end entry journey! Whether you are looking for a career change, upskilling or fulfilling personal interests, we are dedicated to providing you with the best learning resources and support. Let's explore the wonderful world of web development together! Join the front-end entry journey and become an outstanding front-end developer! Let's set sail on the front-end journey , skip the pictures below and start today's text! ! !
Event delegation and event binding are two different ways of handling events in JavaScript, and they have some key differences:
⭐Event Binding
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Directly bind event handlers: Event binding attaches event handlers directly to specific DOM elements. This means you need to explicitly select the elements to which you want to attach the event handler, and bind the event on each element individually.
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Single element pays attention to events: The way of event binding means that each element needs to pay attention to the event. Therefore, if there are multiple similar elements that need to handle the same type of events, you need to bind event handlers to each element separately.
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Static and dynamic elements: Event binding is typically used with static and dynamically generated elements. For the latter, you need to make sure you bind the event after the element is created.
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Often used for small-scale event processing: For event processing of a small number of elements, event binding is a simple and intuitive method.
Example:
// 事件绑定，为每个按钮绑定点击事件处理程序
const buttons = document.querySelectorAll('button');
buttons.forEach((button) => {
button.addEventListener('click', () => {
// 处理点击事件
});
});
⭐Event Delegation
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Delegate event handling: Event delegation is to bind an event handler to a parent element containing multiple child elements, and then delegate the parent element to handle the child element's events through event bubbling.
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Single event handler: Event delegation requires only one event handler, no matter how many child elements need to handle the event, which reduces memory consumption and event binding.
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Dynamic element support: Event delegation also works with dynamically generated elements, since the parent element is usually static and it does not need to know when the child element was created.
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Often used for large-scale event processing: When events need to be processed for a large number of elements, event delegation is usually more efficient.
Example:
// 事件委托，将点击事件委托给父元素
const parentElement = document.getElementById('parent-element');
parentElement.addEventListener('click', (event) => {
if (event.target.tagName === 'BUTTON') {
// 处理按钮点击事件
}
});
⭐ Choose event binding or event delegation
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Scale and performance: For events that need to handle a large number of similar elements, especially in performance-sensitive applications, event delegation is often more efficient. But for events with a small number of elements, event binding may be simpler.
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Dynamic: If elements are generated dynamically via JavaScript, event delegation can be more easily applied to those elements.
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Maintainability: Event binding is often more intuitive in code because you can explicitly see the event handlers for each element. The event delegate code may require more conditional statements to handle different child elements.
To sum up, event delegation is suitable for events that need to handle a large number of similar elements, while event binding is suitable for events that handle a small number of elements. Which method you choose depends on your specific needs and performance considerations.
⭐Write at the end
This column is suitable for a wide range of readers, and is suitable for front-end beginners; or those who have not learned front-end and are interested in front-end, or back-end students who want to better show themselves and expand some front-end knowledge points during the interview process, so If you have the basics of front-end and follow this column, it can also help you to find and fill in the gaps to a great extent. Since the blogger himself does the content output, if there are any flaws in the article, you can contact me through the left side of the homepage. , let’s make progress together, and at the same time, I also recommend several columns to everyone. Interested partners can subscribe: In addition to the columns below, you can also go to my homepage to see other columns;
Front-end games (free) This column will take you into a world full of creativity and fun. By using the basic knowledge of HTML, CSS and JavaScript, we will build various interesting page games together. Whether you are a beginner or have some front-end development experience, this column is for you. We'll start with the basics and walk you through the skills you need to build a page game. Through practical cases and exercises, you will learn how to use HTML to build page structure, use CSS to beautify the game interface, and use JavaScript to add interactive and dynamic effects to the game. In this column, we'll cover various types of mini-games, including maze games, brick breaker, snake, minesweeper, calculators, plane battles, tic-tac-toe, puzzles, mazes, and more. Each project guides you through the building process in concise and clear steps, with detailed explanations and code examples. At the same time, we will also share some optimization tips and best practices to help you improve page performance and user experience. Whether you are looking for an interesting project to exercise your front-end skills, or are interested in page game development, the front-end games column will be your best choice. Click to subscribe to the front-end games column
Vue3 Transparent Tutorial [From Zero to One] (Paid) Welcome to the Vue3 Transparent Tutorial! This column aims to provide everyone with comprehensive technical knowledge related to Vue3. If you have some Vue2 experience, this column can help you master the core concepts and usage of Vue3. We will start from scratch and guide you step by step to build a complete Vue application. Through practical cases and exercises, you will learn how to use Vue3's template syntax, component development, state management, routing and other functions. We will also introduce some advanced features, such as Composition API and Teleport, to help you better understand and apply the new features of Vue3. In this column, we'll guide you through each project in concise and clear steps, with detailed explanations and sample code. At the same time, we will also share some common problems and solutions in Vue3 development to help you overcome difficulties and improve development efficiency. Whether you want to learn Vue3 in depth or need a comprehensive guide to building a front-end project, the Vue3 thorough tutorial column will become an indispensable resource for you. Click to subscribe to the Vue3 Transparent Tutorial [From Zero to One] column
TypeScript Getting Started Guide (Free) is a column designed to help you quickly get started and master TypeScript related technologies. Through concise and clear language and rich sample code, we will explain the basic concepts, syntax and features of TypeScript in depth. Whether you are a beginner or an experienced developer, you can find a learning path that suits you here. From core features such as type annotations, interfaces, and classes to modular development, tool configuration, and integration with common front-end frameworks, we will comprehensively cover all aspects. By reading this column, you will be able to improve the reliability and maintainability of JavaScript code, and provide better code quality and development efficiency for your projects. Let’s embark on this exciting and challenging TypeScript journey together! Click to subscribe to the TypeScript Getting Started Guide column
