JavaScript

In the object-oriented and prototype chapter, the feeling is quite interesting, and the video explanation is also very clear, here summed up the video Talk about the content, by the way to organize their own ideas. First draw a picture,

Q3: How is the data type detected? What are the ways? What is the principle?Typyof detects the base data type , thereturn value is a string representing the data type, and is lowercase;instanceof detects the object type (the principle is to get an

JavaScript is not an object-oriented language, it is an object-based language. Everything is an object in JavaScript. The way to create custom objects in JavaScript article, I've covered basic methods for creating custom types. So how do you

Candy There is N children standing in a line. Each child is assigned a rating value.You is giving candies to these children subjected to the following requirements: Each child must has at least one candy. Children with a higher rating

First, get the browser size and locationSee also blog: http://www.cnblogs.com/bobodeboke/p/4653920.htmlSecond, get the size and position of the elementMethod one, using the Offsetxxx property1) Offsetheight: The element occupies space vertically,

There is no inherited gratitude in JavaScript. But we can emulate JavaScript's "inheritance" based on JavaScript's prototype:1. Write two function objects and assign one of the functions to the prototype of another function object:Operation Result:2.

1. Template Method mode 1.1 object-oriented implementation of template method patternTake tea and coffee for example, can be organized into the following four steps Boil the water Brew a drink in boiling water Pour the drink into

1. Determine if the form element exists (i)if ("Periodpermonth" in Document.theform) {return true;}else{return false;}2. Determine if the page element existsif (document.getElementById ("XXX")) {Exist}3. Determine if the form element exists (ii)if

I. Function definitionMode 1. Normal way definition functionfunction name (parameter n) {function body}function Add (A, b) {return a+b;}Method 2. Direct Volume definition functionvar function name =function (parameter n) {function body}var

The event object is an object that the DOM provides more detailed information about the event, which is often used when defining event handlers, and in order to ensure that we get an event object that is not NULL, we need to first confirm that:1 if (

IntroducedPrototype mode (prototype) refers to the kind of object that is created with a prototype instance, and creates a new object by copying the prototypes.BodyFor prototype mode, we can take advantage of the JavaScript-specific prototype

Closures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.The scope of a variableTo understand closures, you must first understand the special variable scope of JavaScript.The

CSS3 vertical tree chart-Use: before AND: after, css3 tree For more information, see the video. My own CSS3 practice demo. [Demo] [HTML] parent child

JavaScript: Execution context (Execution Contexts)Introduction   This chapter describes the execution context in the ECMAScript standard and various types of executable code. In this article, I have referred to justinw's Chinese translation and made

Method call of the Array object in JavaScriptMethod concatfor loop and for in Loop      Join pop shift   Var arr = [,]; var arr2 = [, 4]; alert (arr. join (-); alert (arr. pop (); // Delete and return the last element. If the array is empty, //

JavaScript -- recursion, nesting, and closure The three methods of function creation and recursion, nesting and closure are often easy to confuse. Three methods of function Definition: 1. Declarative function (standard keyword function + function

Summary of JavaScript date object usage Create a javascript Date object   Create a date object:Var objDate = new Date ([arguments list]);I have summarized the following parameters:New Date (month dd yyyy hh: mm: ss );// The following hh: mm:

JavaScript: Object creation mode (Part 1)Introduction This article describes how to create objects. using various techniques, you can avoid errors or write very simple code.Mode 1: namespace) The namespace can reduce the number of global names

JavaScript: Template Method of Design PatternIntroduction The template method (TemplateMethod) defines the skeleton of an algorithm in an operation, and delays some steps to the subclass. The template method allows the subclass to redefine certain

JQuery event delegate instance analysis and jquery delegate instance analysis Event delegation is mainly implemented by event bubbling. precise understanding of event delegation can help improve code execution efficiency. Let's take a look at a code