javascript filereader example

This article mainly introduces how to parse and optimize the code of the example code for the running lantern lottery in JavaScript (I). If you need more information, please refer to the latest project, one of the project requirements is to achieve the lucky draw effect, this function mainly uses js-related knowledge, not to mention nonsense, interested friends can read the full text. Before you begin, let

JavaScript allows a function to pass a variable number of parameters. Because of the built-in object arguments, the array of all parameters transmitted by a function is a remote question: JavaScript has been exposed for a long time, but you have not paid attention to it, many cool and dazzling web pages have JavaScript, and Google's

This article mainly introduces how to dynamically set styles in javascript, and analyzes the error points and related usage skills of style operations in javascript, for more information about how to dynamically set styles in javascript, see the following example. Share it with you for your reference. The specific anal

This article mainly introduces the encode64 encryption algorithm implemented by JavaScript. The example analyzes the techniques of using javascript to process encode64 encoding for string encryption, which is very simple and practical, for more information, see the example in this article to describe the encode64 encry

This article mainly introduces the encode64 encryption algorithm implemented by JavaScript. The example analyzes the techniques of using javascript to process encode64 encoding for string encryption, which is very simple and practical, for more information, see the example in this article to describe the encode64 encry

actual development, a message and name information is usually prompted to developers to handle exceptions in a targeted manner. (2) Type of the Error object We can see the exception type through the name attribute in (1. In js, there are several common exception types: TypeError: This is triggered when an unexpected type is encountered, such as undeclared variables;SyntaxError: A syntax error occurs when parsing js Code. For example, when the server

This article mainly introduces the javascript Inheritance Mechanism and analyzes in detail the principle of javascript inheritance and the inheritance Implementation Method Based on prototype chain in the form of examples, which has good reference value, for more information about the javascript Inheritance Mechanism, see the

This article mainly introduces the implementation of simple mouse drag effects in javascript. The example analyzes the key points and implementation skills related to the javascript mouse drag effect, which is of great practical value, for more information about how to use javascript, see the following

This article mainly introduces the use of javascript Delegate blur and focus. The example analyzes the usage of javascript Delegate and the usage skills for common browsers, for more information about how to use the javascript Delegate blur and focus, see the example in this

returns an object literal and defines a value variable in the function. This variable is always available for the add and getValue methods, but the function scope makes it invisible to other programs. At the same time, we can draw a conclusion that internal functions have a longer life cycle than their external functions. Let's continue to look at a constructor call example. The Code is as follows: Var MyObj = function (str ){This. status = str;};

This article mainly introduces the asynchronous Script Loading Method of javascript with callback functions, and analyzes in detail the definition and usage skills of javascript callback functions for asynchronous loading in the form of examples, for more information about how to load javascript asynchronous scripts with callback functions, see the following

Javascript: Example: Try to write friendly Javascript code, Javascript tutorial In the Search Engine's robot Search, the "text" such as type, text, and html have the highest degree of friendliness (except for text/xml at present ), the friendliness of text and javascript is

This article mainly introduces the JavaScript date selection function, and analyzes the javascript Date and Time related operation skills in the form of examples. If you need it, you can refer to the next article to introduce the JavaScript date selection function, I analyzed the javascript Date and Time related operat

This article mainly introduces the JavaScript date selection function, and analyzes the javascript date and time related operation skills in the form of examples. if you need it, you can refer to the next article to introduce the JavaScript date selection function, I analyzed the javascript date and time related operat

as an o method. Any arguments passed in the new function are passed in to the original function. As follows: Script function introduce (country, holobby) {return "Hello, My name is" + this. name + ", this year" + this. age + "years old, from" + country + ", like" + holobby;} var xiaoming = {name: "James", age: 20} var jieshao = introduce. bind (xiaoming); console. log (jieshao ("China", "playing"); script Execution result:Hello everyone, my name is James. I am 20 years old and come from China

This article describes how to remove the last element of an array using the pop method in JavaScript. The example shows how to use the pop method in javascript, for more information about how to remove the last element of an array using the pop method in JavaScript, see the following

This article mainly introduces the use of JavaScript Object reflection. The example analyzes the specific usage of reflected DOM objects and custom objects, which has some reference value, for more information about how to use JavaScript Object reflection, see the example in this article. Share it with you for your ref

This article mainly introduces the use of JavaScript Object reflection. The example analyzes the specific usage of Reflected DOM objects and custom objects, which has some reference value, for more information about how to use JavaScript Object reflection, see the example in this article. Share it with you for your ref

Example of several methods for deleting elements in an array in Javascript loop: javascript Array This article mainly shares with you several methods to delete elements in an array through Javascript loop, for your reference and learning. The following is a detailed introduction: Problems Found You may need to remove a

Example of anonymous function usage in JavaScript and javascript This example describes how to use anonymous functions in JavaScript. Share it with you for your reference. The specific analysis is as follows: In JS, you do not need to assign a function name. Instead, you c