深入理解页面如何渲染至浏览器
浏览器是一个多进程架构，每个标签页都是一个进程，每个进程都包括渲染进程、网络进程、GPU进程、插件进程、浏览器进程等。渲染进程负责将HTML、CSS、JavaScript等资源渲染成页面，是浏览器渲染的核心部分。
浏览器是多进程架构，每个进程又包含多个线程，进程之间通过PIC进行通信来协调工作。
the difference among MVVM ,MVC and MVP
There are two main ways in which the view of a website manipulates the model of a website. that’s either with a controller or with a View Model.
Although the logic that’s necessary to run an application like Facebook is different from the logic that’s necessary to run an application like google, at its core, any website’s functionality is simply a way in which the front end or the view can reach the appropriate model to retrieve data. In any case, there will always be a model and there will always be a view. What really changes is the way in which the models and views are connected.
some principles to write fancy codes
There are some principles that we can refer to when we write codes.
Avoid bad naming pattern
How does the v8 engine work?
When the V8 engine executes the JS source codes, firstly the parser gets the codes and then constructs a data structure called AST and scope based on it. Next, the bytecode generator runs through the AST and generates the bytecode. Then Ignition compiler reads the bytecode and executes each instruction in turn, performing the operations specified by the bytecode. This allows the code to be executed quickly, even before it is optimized into machine code by the TurboFan compiler. Finally, the TurboFan optimizing compiler converts the bytecode into highly optimized machine code, which can be directly performed by the computer processor. 
The bytecode generated by the V8 engine is not directly executable on the computer’s hardware, because it is a platform-independent representation of the original JavaScript code. However, the bytecode can be interpreted by the Ignition interpreter, which is part of the V8 engine and is capable of executing the bytecode. The Ignition interpreter reads the bytecode and executes it by interpreting each instruction and performing the corresponding operations on the data structures in memory. This allows the JavaScript code to be executed on any platform that has a compatible implementation of the V8 engine, regardless of the underlying hardware architecture.
the programming paradigm comparison between FP and OOP
A programming paradigm is a fundamental approach or style of programming that describes how solutions to problems can be formulated using programming languages.Each programming paradigm is baesd on a set of principles,concepts, and practices that guide the process of software design and development.Here are two programming paradigms that will be differentiated.
The programming paradigm is a way of thinking about and structuring computer programs. For developers, it means how you write your code or organize your code.
Functional Programming
FP is functional programming, which should use pure functions and avoid side effects. the pure function means that the outputs in this function only depend on the inputs. the input paragram can be anything like numbers or functions as well as the outputs. the pure function is easier to test and reason about. ````javascript let num=123 // it is a pure funciton which only depends on the input val and don’t change and depend on any outside value function toString(val){ return val.toString() } const str=toString(num)
the fundamental knowledge of node.js for beginners
node.js is an open-source, cross-platform JavaScript runtime environment. Node.js runtime provides all the necessary components so as to use and run JavaScript code outside the browser.