JavaScript

1.tab key (must) use four spaces instead of2. After each line of code (must) add ";"3. The names of variables, constants, and classes are executed according to (must) the following rules:1) Variable: must be named with the Camel Peak and the first

1, use strict mode, add code specification' Use strict 'This is a good habit to avoid some hidden errors in your code. Strict mode is used by default in ES62, JS ES5 Two ways to declare the method(function () { ' use strict '; // A function

In the page, we can put tag pairs in the body tag , tag pairsAlert statementThe purpose of alert (translated as "alert"): pops up "warning box".Grammar rulesThe study procedure, is has the law to follow, is the procedure has the same part, these

BP Neural Network is a multi-layer feedforward neural network which is trained according to the error inverse propagation algorithm, and is the most widely used neural network at present.BP neural network error reverse propagation neural network:

Reprint: https://www.cnblogs.com/weiqinl/p/9049745.htmlThere are two ways to compare JavaScript: the strict comparison operator and the conversion type comparison operator.Corresponds === , and, in the equality operator !== == != .Give me a chestnut

Excerpt: 43148705The same-origin policy restricts the way in which a source (origin) is loaded or scripted with resources from other sources (origin).Same-origin definitionIf two pages have the same protocol (protocol), the port (if specified), and

Values for base types and reference types　　Basic type (simple data segment)The base data type is accessed by value, because the actual value is stored in the variable.　　Reference types (objects that may consist of multiple values)Reference types are

1 instanceof:1.1 Normal use: Determine if an object is an instance of a constructor:Syntax: The object instanceof function is return true, not return false.instanceof Object);1.2 Advanced Usage:Determines whether the prototype object of a function

altThe method allows us to recover from a nothing with a default maybe, but sometimes our recovery efforts might need t o Enlist some logic to recover properly. In this lesson, we'll see how we can use the method on the maybe to recover from a

Group display of a field in an array of JavaScript objects

Internal implementation:function ClassA(sColor) {this.color = sColorthis.sayColor = function () { console.log(this.color)}}function ClassB(sName) {this.name = sNamethis.sayName = function () { console.log(this.name)}}function ClassC(sColor,

(1) When passing a value of a primitive type to a parameter, the passed value is copied to a local variable (that is, an element in the arguments object). This means that the parameter is actually a local variable of the function.(2) When passing a

1.alert (1&&2), Alert (1| | 0)The result of alert (1&&2) is 2.As long as "&&" is preceded by false, whether "&&" is followed by true or false, the result will be returned to the value preceding "&&";As long as "&&" is preceded by true, whether "&&"

Using the DOM treeFirst, access the element1. Select a single element node(1) Geteelementbyid ()Using the element's ID attribute(2) using the CSS selector to return the first matching elementQueryselector ()Varhotitem=document.queryselectorall (' li.

2.1 Variable 2.1.1 What is a variableLiterally, variables are variable quantities, and from a programmatic point of view, variables are memory used to store data, each with its own unique name and each variable occupying a memory.In the program, it

1.javascript:void (0) meaningWe often use code such as Javascript:void (0), so what does javascript:void (0) mean in JavaScript?The key in Javascript:void (0) is the Void keyword, which is a very important keyword in JavaScript, which specifies that

Knowledge Points: html/css layout thinking, audio tag API application, CSS3 Custom animation, JS music playback control, lyrics synchronization and so on.HTML code: [00:00.64] Little Lucky-Tan Jiayi [00:02.15] Word: Xu Shijian & Wu hui Fu [00:03

In Linux/Unix, reload the. vimrc file without restarting Vim. vimrc I am a new Vim editor user. I usually use:vs ~/.vimrc To load~/.vimrc Configuration. When I edit. vimrc, I need to reload it without restarting the Vim session. In Linux or

Disable eslint verification and vueeslint verification for vue Projects Introduction eslint Eslint is a JavaScript Validation plug-in that is usually used to verify the syntax or code writing style. Official documents: https://eslint.org This

How to parse data perfectly in js and parse data perfectly in js Since the frontend and backend separation, the data structure provided by some backend partners has become more and more chaotic. The idea is that separation reduces their burden. The