javascript filereader example

A Simple Example About Privileged Methods in JavaScript, privilegedmethodsDouglas Crockford classified the "class methods" in JavaScript into three types:Private,PrivilegedAndPublic.Public methodsHave an obvious meaning: they can be accessed by the public.Private methods'Meaning are also clear: they cannot be accessed by the public.So what arePrivileged methods?

return ";Output + = "\ n ";Output + = "\ n-newline ";Output + = "\ n ";Output + = "\ f-form feed ";Output + = "\ n ";Alert (output );In the preceding example, the plus sign is used to connect strings without the concat function. The reason is simple. For the concat function, each operation requires a new variable. On the contrary, the method we use here simply expands the original value without the new variable. In addition, the special characters ar

Example of three methods (including two types of Ajax) in the JavaScript call background, javascriptajax Method 1: directly use The front-end JS Code is as follows: The code for the background method is as follows: Public static string BehindMethod () {return "this is a background method ";} Note: 1) Before BehindMethod (),PublicDo not forget the access modifier; 2) This method has limitations -- BehindMe

Python3 provides an example of html webpage function that captures javascript dynamically generated, python3javascript This example describes how Python3 can capture html web pages dynamically generated by javascript. We will share this with you for your reference. The details are as follows: Using urllib to capture a

The example in this article describes the way JavaScript dynamically formats style style. Share to everyone for your reference. The specific analysis is as follows: Dynamic Modify Style 1. Error: Modify the style of the element is not set the Class property, but the ClassName property. 2. Error: Modify the properties of the style individually using "style. Property name." Note that in CSS the attribute n

Introduction to the instanceof operator In JavaScript, to judge the type of a variable to try the typeof operator, it is a problem to store a value using a reference type when using the TypeOf operator, regardless of what type of object is referenced, it returns "Object". ECMAScript introduced another Java operator instanceof to solve the problem. The instanceof operator is similar to the typeof operator and is used to identify the type of object bei

created. Object constructed with the Footballplayer, Messi, search through he__proto__ chain When we tell him to kick. Obviously Footballplayer.prototype is on the chain so Messi knows what to kick. All objects created by theconstructor function share the same Footballplayer.prototype so they all can I Nvoke the publicmethod kick!Private Methodsis kinda tricky. We declare private variable in aConstructorUsing the keywordvar:Function Man () {var Wealth;var bath = function () {};function kiss ()

First, the preface The JavaScript Date object provides a number of dates-related attributes and the relevant methods for manipulating dates, bringing a lot of convenience to the development of the Web site. However, the date format most Web pages display to users may be the same: Yyyy-mm-dd Hh:mm:ss (similar to the C # Java ToString ()). Whether it is the ToString () method of the JavaScript date object,

This article describes how to use PHP + Javascript to enable online photography. it involves the use of javascript plug-ins and php image Upload implementation skills. it has some reference value, for more information about how to use PHP and Javascript, see the following example. Share it with you for your reference.

prototypes Prototypes are important concepts in JavaScript object-oriented features and are too familiar concepts. Because in the vast majorityIn object-oriented languages, objects are class-based (for example, Java and C + +), and objects are the result of class instantiation. And inIn the JavaScript language, there is no concept of class①, an object is instanti

The example in this article describes the way JavaScript dynamically formats style style. Share to everyone for your reference. The specific analysis is as follows: Dynamic Modify Style 1. Error: Modify the style of the element is not set the Class property, but the ClassName property.2. Error: Modify the properties of the style individually using "style. Property name." Note that in CSS the attribute nam

This example describes the array usage in JavaScript. Share to everyone for your reference. The specific analysis is as follows: The array objects in JavaScript are arrays, first a dynamic array, and a super complex like C #, Java "arrays, lists, hashmap/dictionary", and so on. Array arrays How to use: Example 1:

first learned jquery, I saw a sentence in a book: The jquery object is a JavaScript array. And in the use of jquery process, will encounter, JS object to the JQuery object, jquery object to the JS object. No introduction to these basics.But sometimes we want to use the methods or properties of some native array objects on the jquery object. Let's look at a simple example: From the code in the diagram

, 12 13 // empty statement 14 oItNode = oItNode.offsetParent) ; 15 16 console.log("Offset position of \""+ sId +"\" element:\n left: " 17 + nLeft +"px;\n top: "+ nTop +"px;"); 18 } 19 20 showOffsetPos

Javascript example tutorial (20) OLEAutomation (1) use OLE Automation in javaScript We have mentioned OLE Automation in Javascript in the previous tutorial. In this tutorial, we will discuss how JavaScript can use the powerful functions of Automation to expand the capabilit

This article mainly introduces the example of inserting JavaScript code in HTML. nesting in HTML code is the basic function of JavaScript, if you need JavaScript code, refer to any part of the HTML document. But there are also the following best methods to include JavaScript

'); Console.log (IsArray (1)); Console.log (IsArray ([1, 2, 3])); function f (n) {return n * n; } function g (n) {return n * 2; } Console.log (f (g (5))); function pipe (f, g) {return function () {return f.call (null, g.apply (NULL, arguments)); } var fn = pipe (f, g); Console.log (FN (5)); Tail recursion 1. Tail call refers to the last step of a function is to call another function 2. Function call itself, called recursion 3. If the tail calls itself, it is called tail recursion Recu

before executing the script, and all Global variables are attributes of this Global object, when the function is executed, an Activation object is created. All local variables are attributes of this Activation object. For example: The Code is as follows: Var global = 42;This. global; // 42. You can use this to access Global objects.This. global2 = 12;Global2; // 12Function foo (){Var local = 36;// However, you cannot directly access Activation,// T