JavaScript

Javascript-reduce Method (Array)explanation : the reduce () method receives a function as an accumulator (accumulator), an arrayEach value in the (left-to-right) merge begins with a value.Syntax: Arr.reduce (Callback,[initialvalue])Parameters

Object orientedThe general level of technology is limited, there is nothing wrong, I hope you correct.Object-oriented is just a programming pattern, not a particular language, which is embodied in many languages. Object-oriented programming is an

WhyWhen researching a website's front-end technology, it is a good idea to understand its global object.In general, the common library will use the appearance pattern, finally exposes an object to the user to call,Like Jquery,requirejs,angular,react.

??　　 JavaScript gets Web page width, screen height, screen resolution, etc.

GitHub Blog AddressStack, aka stacks, is a linear table in which operations are limited. Follow the LIFO principle, like a trash can.Functional implementation is still in accordance with additions and deletions, internal data storage can borrow the

Object orientedThe general level of technology is limited, there is nothing wrong, I hope you correct.Object-oriented is just a programming pattern, not a particular language, which is embodied in many languages. Object-oriented programming is an

? js callback function ?　　Callback functions in JavaScript

Untitled Document JavaScript usually small example ⑦ (mouse-following Div)

From 2017 there are alsoJavaScript usually small example ④ (setinterval use 2)

1, NULLNull is an object that represents an empty object pointer, typeof (NULL) returns a object,null when the join operation is converted to 0, initializes the object to null, and knows if the variable holds a reference to the object2,

JS Gets the height of the document: Math.max (document.body.scrollheight,document.documenelement.scrollheight);JS Gets the height of the viewable area of the browser: Math.max (document.body.clientHeight,

PolymorphicThe idea behind polymorphism is to separate "what to do" and "who to do and how to do", that is, to separate "unchanging things" from "mutable things".The most fundamental function is to eliminate these conditional branching statements by

JavaScript is allowed for basic types of expansion functionality. For example, you can make this method available to all objects by adding a method to Object.prototype. Such a way applies to functions, arrays, strings, numbers, regular expressions,

JavaScript Inheritance (prototype chain)We know that inheritance is an integral part of the OO language, and for JavaScript as well. There are two types of inheritance: One, the interface inherits, only the signature of the method, and the other,

summary of various widths and positions in JavaScriptWhen manipulating DOM nodes in JavaScript to make them move, it often involves various concepts such as width and height and position coordinates, and without a good understanding of the meaning

We all know that there are two ways to define a function, one is a function declaration and the other is a function expression. function declarationThe syntax is: the function keyword is followed by its name. For example:function

The Requirejs loaded JavaScript file is described in the previous article, which describes how to execute code after loading JavaScriptThis is the test2.html file,DOCTYPE HTML>HTML> Head> MetaCharSet= "utf-8" /> title>Test2title>

Gihub Blog AddressA queue is a special linear table, except that it allows for deletion only at the front end of the table (front), but in the Back-end (rear) of the table, and, like the stack, the queue is a linear table of operations that is

DOCTYPE HTML>HTML>HeadLang= "en"> MetaCharSet= "UTF-8"> title>title> style> *{margin:0;padding:0; }#div1{width:1320px;Height:213px;margin:100px Auto;position:relative;background:Red;Overflow:Hidden; }#div1

Move the table cursor to change the cell border color ., Table Cell Table definedBorder-collapse: collapse; the border is merged into a single border. The border-spacing and empty-cells attributes are ignored. Use td: hover to display