JavaScript is an important programming language for web development, and there are many points to keep in mind, but here are some of them.
Basic syntax
Basic syntax: It is important to understand the basic syntax of JavaScript.
This includes how to declare variables, data types, operators, conditional branching, and loop syntax.
DOM (Document Object Model)
DOM (Document Object Model): DOM is an API for manipulating web pages.
You need to understand DOM to use JavaScript to manipulate HTML elements on a web page.
Asynchronous processing
Asynchronous processing: JavaScript is an event-driven programming language, and asynchronous processing plays an important role.
It is important to understand concepts such as promises, async/await, and callback functions.
Closures
Closures in JavaScript indicate a strong connection between a function and its surrounding environment.
Because functions can be defined within functions, it is important to understand how to handle scopes and variables.
Debugging techniques
Debugging techniques: In JavaScript, debugging techniques are important for finding bugs in the code.
It is important to learn how to debug using console.log and how to debug using breakpoints.
Libraries and Frameworks
Libraries and Frameworks: There are many libraries and frameworks for JavaScript. Typical examples include jQuery, React, and Vue.js.
It is important to understand how to develop web applications using these libraries and frameworks.
Security
Security: When developing web applications using JavaScript, security must be taken into consideration.
It is important to learn about security vulnerabilities such as cross-site scripting (XSS) and SQL injection, and understand how to deal with them.
ES6 (ECMAScript 2015)
ES6 (ECMAScript 2015): ES6 is a version of JavaScript released in 2015, and introduced new features and syntax.
For example, it includes the introduction of block scope using let and const, arrow functions, and classes.
Understanding the features of ES6 will enable you to code more modern and efficient JavaScript.
Modules
Modules: JavaScript now allows code reuse through modularization.
A module is a unit of code divided by function and is used by being imported by other files.
Modularization improves code maintainability and reusability, and improves development efficiency.
TypeScript
TypeScript: TypeScript is an extension of JavaScript and supports static typing.
Static typing improves code quality and safety, and also improves development efficiency.
TypeScript is a superset of JavaScript, so code written in JavaScript can be used as is. It is also widely used in frameworks such as Angular and React.
Summary
The above are some of the points to keep in mind when learning JavaScript.
JavaScript is an essential technology in web development and is used to increase interactivity with users. For example, form input checking, dynamic addition and deletion of content, page scrolling, drag and drop, etc. are realized by JavaScript.
There are also many frameworks and libraries that use JavaScript, which are used to make web application development more efficient. Representative examples are front-end frameworks such as React and Vue.js, back-end frameworks such as Node.js, and libraries such as jQuery and Bootstrap.
Moreover, JavaScript is used not only in browsers, but also in a wide range of platforms such as mobile apps and desktop applications. For example, React Native and Electron are frameworks for developing mobile apps and desktop applications using JavaScript.
The widespread use of JavaScript has made web development more advanced, resulting in more interactive and dynamic websites. And as JavaScript continues to evolve, it is expected that more advanced and easier-to-use web technologies will be developed.
