JavaScript

The same-origin strategy, a well-known security policy presented by Netscape, is now used by all JavaScript-capable browsers.Why a homologous strategy is required, here is an example:Suppose there is no homologous strategy now, what will happen? As

The Word object-oriented JavaScript is actually a bit superfluous, because the language of JavaScript is completely object-oriented and cannot be used in a non-object-oriented way. However, the common weakness of most novice programmers (including

JavaScript variablesA variable is a container for storing information. Instancevar x=2;var y=3;var z=x+y;It's like algebra.x=2Y=3Z=x+yIn algebra, we use letters (such as x) to hold values (such as 2).By the above expression Z=x+y, we can calculate

JavaScript provides a built-in math object, which has a powerful and convenient auxiliary computing function, this article summarizes its properties and methods, equivalent to a solid foundation of the following ~1. Properties of the Math objectMATH.

Accelerating motion, that is, an object moving faster and faster, slowing down, that is, when an object moves more and more slowly. Now, using JavaScript to simulate these two effects, the principle is to use setinterval or settimeout to dynamically

One day I was asked what language to learn in order to gain an edge in web development work quickly. My mind went back to college, when I used Pascal, Fortran, c and assembly language, but there were different goals at that time.Given the current

Recently, Mr. Chen asked me to add a key record of the new architecture to the business. To learn JavaScript, find some code on the Internet, and finally write out:js key record Press any key to view keyboard response key values: This code modifies

I've been looking at some of the JavaScript principles, and I happen to see an analysis of the author of jquery about the principle of the JavaScript timer, so I decided to translate the original into Chinese, to share with you, and secondly, to

I. BASIC OBJECTIVESDesign a countdown timer in JavaScript, and once the time is done, the button becomes non-clickable.Specific effects such as, in order to illustrate the problem, the tune to every 50 milliseconds, that is, every 0.05 jumps a table,

I have a headache this evening, why?After all, halfway decent, my understanding of JavaScript just stuck in: invoking JavaScript, changing the page style, elements and implementing some of the response of the event, although the need for the time

From a linguistic point of view, allowing code to use global variables in an uncontrolled manner is one of the most wrong choices. What is more frightening is that a variable "may" become global (at unknown time and place). But these two, along with

var v1 = []var v2 = {};var v3 = {};function foo (v1, v2, v3) {V1 = [1];v2 = [2];V3 = {A:3}}Foo (v1, v2, v3);Alert (v1); BlankAlert (v2); [Object Object]alert (V3.A); Undefined/* This shows: v1, V2, V3 have not been changed, V1 is still an array of 0

JavaScript Event List CommentaryEvent Browser Support CommentaryGeneral event onclick IE3, N2 trigger this event when mouse clicksOnDblClick IE4, N4 triggers this event when the mouse double-clicksOnMouseDown IE4, N4 triggers this event when the

Introduction to the console. assert () function in JavaScript, console. assert During the development and maintenance of JavaScript programs, Assert is a good feature to ensure program correctness. In browsers with debugging tools, this feature can

Introduction to mathematical operations in JavaScript and mathematical operations in javascript In JavaScript, mathematical operations can be achieved through two operations: 1. +,-, *,/, %, and other operators.2. Use the computing functions of the

Easy creation of nodejs server (10): Process uploaded images and nodejs upload images This section describes how to upload an image and display it in a browser. Here we will use the node-formidable module developed by Felix Geisend örfer. It

Chrome skills record some previously unfamiliar, chrome is not Chrome has never known how many years it has been in use, but it is still unfamiliar with some techniques, recording useful and unfamiliar   How to view dom binding events (view jquery

Node. js favicon. ico request troubleshooting, node. jsfavicon. ico Copy codeThe Code is as follows:Var http = require ("http ");Var server = http. createServer ();Server. on ("request", function (req, res) {5 console. log (req. url );Res. end ();})

ExtJs -- 09 -- three methods of javascript Object writing prototype: the most efficient way to set prototype through prototype /*** Recommended three methods for writing javascript objects. The third method is recommended for execution efficiency. *

[Reading Notes] Head first HTML with CSS version 2, headcss Appendix: HTML Cheat Sheet I read 300 pages one afternoon. This book is really a vernacular, and the target readers should be those who have no programming experience at all. Tips: IE