JavaScript

Reprint from Nanyi blog: http://www.ruanyifeng.com/blog/2013/01/javascript_strict_mode.html#comment-267934I. OverviewIn addition to the normal operating mode, ECMAscript 5 adds a second mode of operation: "Strict mode" (strict). As the name implies,

var a = ‘5‘;switch (a) {  case 5:    console.log(‘==‘);    break;  case "5":    console.log(‘===‘);    break;  default:}The last console display is = = =, it seems to be safe to use. Looking for a previous study note, well, it is true that the

Access sub-node ChildNodesAccesses the list of all child nodes under the selected element node, the returned value can be considered an array, and he has the length property.Grammar:Elementnode.childnodesAttention:If the selected node has no child

Method One:An extension to date that converts date to a string of the specified formatThe month (m), Day (d), hour (h), Minute (m), second (s), quarter (q) can be used with 1-2 placeholders,Year (y) can use 1-4 placeholders, milliseconds (S) with

JavaScript evaluates to false values: null, False, 0, undefined, NaN, and "" (empty string). Remember that the value of this Nan class like Infinity (Infinity) is judged to be true and not false. However, NaN is judged false. In addition to these,

I. Overview In addition to the normal operating mode, ECMAscript 5 adds a second mode of operation: "Strict mode" (strict). As the name implies, this mode allows JavaScript to run under stricter conditions. The purpose of setting up a "strict mode"

This article is my own study summary, for beginners reference use. The great god please ignore .... Knowledge summary from JS Advanced Programming ^ _ ^First, each entry of the array type in JS can hold any type of data. And the size of the array

Several issues to be aware of in JavaScriptJavaScript is a weak language, she does not use a very cumbersome memory management, type definition and so on, so the learning JavaScript threshold is relatively low. Low threshold does not mean that the

ObjectiveJavaScript has 7 data types, including 5 primitive types (also called primitive values) number, Boolean, string, null, undefined, and 2 Composite type Object, array, which can be converted to one another according to some rule. The

Design PatternsDesign patterns are naming, abstracting, and identifying common design structures that are useful for reusable object-oriented design. Design patterns determine the classes and their entities, their roles and collaborations, and their

JavaScript Get path1. Design Source code javascript received Fetch path 2. Design Results(1) When initializing(2) Get the current URL(3) Get the folder after the host address(4) Returns the position of the first occurrence of a specified

1. function as a namespace. form: var Somefn = (function () {var a = 0;return function f () {//...};} ());2. closures. Parameters of an external function cannot be accessed directly within a closure unless the external argument is stored as a

Vertical Margin of Margin and vertical Margin of Margin During the exercise, I encountered a margin problem. The code structure is as follows: Set margin: 50px auto for the sub-element div in the parent element body; originally, I wanted to make the

Four parameters are passed in detail, and four parameters are passed in detail. This article is summarized in daily work. The following shows the transmission of four parameters. When to use GET, query, delete, When to use POST, add, and modify

Detailed analysis of JavaScript function definitions and javascript function definitions Function Key points: A). functions are first-class citizens (importance) in javascript)B). A function is an object.C). The function defines an independent

Sass: first recognized the use of Sass and Koala tools, sasskoala 1. Download and install Koala (find the appropriate System Version)     Second, first create a CSS folder, and create a new file (.txt) in it, and name it demo. scss     3. Open

Input/output stream in javaSE-one read stream corresponds to multiple output streams. The generated part files are numbered in sequence. Package com. io. other. split; import java. io. file; import java. io. fileInputStream; import java. io.

JavaScript Simulation for keyboard typing This article mainly introduces how to simulate and implement keyboard typing using JavaScript. This article provides the example code directly. For more information, see ? 1 2 3 4 5 6 7 8 9 10 11

Rotating circle instance based on jQuery and jquery rotating instance This article describes how to rotate a circle Based on jQuery. Share it with you for your reference. The specific implementation method is as follows: circle of rotation

Unit Test Method in JavaScript AngularJS Library This article describes how to perform unit tests in the AngularJS library of JavaScript. It is mainly related to controllers in AngularJS. For more information, see Developers all agree that unit