javascript problems for beginners

Javascript variables, scopes, and memory problems, javascript Javascript variables, scopes, and memory problems (1) JavaScript variables can be used to save two types of values.: Basic type value and reference type value. The valu

other domains cannot be loaded, but only js files can be used. jsonp is implemented in this way. jsonp passes a callback parameter to other domains, the callback parameter value and json string are packed into javascript Functions in the background of other domains to return the result. Because the request is sent through the script tag, the browser parses the returned string according to javascript, imple

Typical Summary of various javascript problems about motion, and typical Summary of javascript This example summarizes various javascript problems about motion. Share it with you for your reference. The details are as follows: I. JS movement

In our daily front-end development work, we often deal with HTML, javascript, css and other languages, just like a real language, computer languages also have their alphabet, syntax, lexical, and encoding methods. In daily front-end development, we often deal with HTML, javascript, css, and other languages, like a real language, a computer language also has its alphabet, syntax, lexical, and encoding method

Resolving problems with errors running builder JavaScript validator in eclipse Specific error message: Errors occurred during the build. Errors running builder ' JavaScript Validator ' on Project To solve this problem, you need to remove the JavaScript validator. Remove the method is: Select an item--right key properti

Javascript photo wall creation and production problems, javascript Production Process This article mainly creates a photo wall. The entire production process mainly needs to solve the following problems: 1. How do I perform layout conversion? 2. How to drag and drop images? 3. How to detect image collisions? Collision

This article mainly introduces the problems and solutions for implementing waterfall stream self-adaptation in javascript. For more information about how to use javascript to implement waterfall stream, see Amy's guide in the next few days, I followed the code. It is found that this write can only adapt to the screen when loading for the first time, and the windo

Solve the JavaScript page refresh and pop-up window Problems 1. No prompt to refresh the webpage Have you found that when refreshing some webpages, a prompt window will pop up and click "OK" to refresh the page. Some pages do not prompt. If the prompt window is not displayed, the page is refreshed directly. If the page does not have a form, the prompt window is not displayed. If the page has a form, A) B)

This article mainly introduces the problems and solutions for implementing Waterfall Stream self-adaptation in javascript. For more information about how to use javascript to implement Waterfall Stream, see Amy's guide in the next few days, I followed the code. It is found that this write can only adapt to the screen when loading for the first time, and the windo

The following small series will bring you a quick solution to the 23 problems of Multi-browser compatibility in JavaScript. I think it is quite good. Now I will share it with you and give you a reference. Let's take a look at it with xiaobian. I. document. formName. item ("itemName ") Problem description: in IE, you can use document. formName. item ("itemName") or document. formName. elements ["elementName

JavaScript variable scope and memory problems (2). javascript Variables Execution environment is a particularly important concept in js. It means that variables or functions can access other data and define their own behaviors. Each execution environment has a corresponding variable object. All variables and functions defined in the execution environment are stor

I recently read a book titled "high-performance javaScript" and found that many minor details exist in my javaScript writing. Although these problems do not cause program running errors, they may slow the interface loading, the user experience is poor, so let's take a closer look at the points that should be noted. 1. The fewer the script tags, the better. (altho

I recently read a book titled "high-performance javaScript" and found that many minor details exist in my javaScript writing. Although these problems do not cause program running errors, they may slow the interface loading, the user experience is poor, so let's take a closer look at the points that should be noted. 1. The fewer the script tags, the better. (altho

This article mainly introduces the problems caused by the assignment operations such as concatenation in javascript. For more information, see the preface. This sentence in the title of the article was originally seen in a foreign JavaScript specification. at that time, it did not attract enough attention, until the last time there was a bug that found the chara

Because MVC5 does not contain jquery.unobtrusive-ajax.js in the new projectInstall the following two files with the NuGet Package Manager consoleInstall-package jquery–version 1.10.2Install-package Microsoft.jquery.unobtrusive.ajax–version 3.0.0The NuGet Package Manager controls the Open method:For more information about how the three actionresult of Emptyresult, Contentresult, and Fileresult respond to the client's results, take a look at this articleHttp://www.cnblogs.com/artech/archive/2012/0

Summary of various methods to solve JavaScript Array problems. Many blueidea experts jointly created a1 = ['020', '021 ',.......... '025',...]; A2 = ['shanghai', 'tianjin ',... Nanjing,...]; The length is the same as the length, and corresponds to one by one. How can we get the a2 Nanjing in a1? I tried a method, but I used a lot of eval and a loop, and I don't feel very good: Script var a1 = ['020', '021

3) Scope chain-related issuesThe scope chain is a very red concept in the JavaScript language, and many programmers who learn and use JavaScript know that the scope chain is the key to understanding some of the concepts that are important in JavaScript, including the this pointer, closures, and so on. It is very red another important reason is that the scope of t

3 problems related to the scope chain The scope chain is a very red concept in the JavaScript language, and many programmers who learn and use the JavaScript language know that the scope chain is key to understanding some of the most important concepts in JavaScript, including this pointer, closures, and so on, Another

Objective:Recently in the language of learning JavaScript, see a lot of online is in the introduction of JavaScript How to solve the problem on the page code, so want to find a way to use JavaScript code to implement the C language Classic program problems. Of course, these C language program is relatively simple, main

These two days when doing JavaScript PHPRPC 3.0 clients based on FLASH9 (ActionScript 3.0) encountered some of the problems of JavaScript interacting with ActionScript 3.0, which basically didn't find answers online, Finally through a constant attempt to solve, so summed up here, hoping to give some help to the comrades who have the same