JavaScript Refresh Page. In JavaScript, you refresh the page using document.location.reload(). You can add the true keyword to force the reloaded page to come from the server (instead of cache). Alternatively, you can use the false keyword to reload the page from the cache. This code can be called automatically upon an event or simply when the user clicks on a link. Example JavaScript Refresh Code Auto-Refresh You can also use JavaScript to refresh the page automatically after a given time period. Here, we are refreshing the page 5 seconds after the page loads. Other Refresh Tricks By including your refresh code in a function, you can have complete control over when the page is refreshed.
Example 1 Instead of having the "page refresh" function called automatically when the page loads, you can call it only when the user performs some action - such as clicking on a link. Example 2 You can use conditional statements to determine whether or not to refresh the page. Json_encode. Codepad. Writing Your Own Data Source - Implementing the Wire Protocol (V. This page describes how you can implement a service that supports the Chart Tools Datasource protocol to expose data to charts using the Query class. Contents Audience This page is intended primarily for developers who will be creating their own data source without the aid of the Chart Tools Datasource Library.
If you are using that or any other helper libraries, read your library's documentation first. This page is also intended for readers interested in understanding the wire protocol used for communication between a client visualization and a data source. If you are creating or using a visualization, you do not need to read this page. In order to read this document, you should understand basic JSON and HTTP request syntax. Note: Google does not officially endorse or support any non-Google Datasources that support the Chart Tools Datasource protocol. Overview You can implement the Chart Tools Datasource protocol in order to become a data source provider for your own charts, or other charts.
JSON. JSON (/ˈdʒeɪsən/ JAY-sən),[1] or JavaScript Object Notation, is an open standard format that uses human-readable text to transmit data objects consisting of attribute–value pairs. It is used primarily to transmit data between a server and web application, as an alternative to XML. Although originally derived from the JavaScript scripting language, JSON is a language-independent data format.
Code for parsing and generating JSON data is readily available in many programming languages. The JSON format was originally specified by Douglas Crockford. It is currently described by two competing standards, RFC 7159 and ECMA-404. The ECMA standard is minimal, describing only the allowed grammar syntax, whereas the RFC also provides some semantic and security considerations.[2] The official Internet media type for JSON is application/json.
History[edit] Data types, syntax and example[edit] JSON's basic types are: The following example shows a possible JSON representation describing a person. Ajax[edit] Writing Your Own Data Source - Implementing the Wire Protocol (V. This page describes how you can implement a service that supports the Chart Tools Datasource protocol to expose data to charts using the Query class. Contents Audience This page is intended primarily for developers who will be creating their own data source without the aid of the Chart Tools Datasource Library. If you are using that or any other helper libraries, read your library's documentation first. This page is also intended for readers interested in understanding the wire protocol used for communication between a client visualization and a data source. If you are creating or using a visualization, you do not need to read this page.
In order to read this document, you should understand basic JSON and HTTP request syntax. Note: Google does not officially endorse or support any non-Google Datasources that support the Chart Tools Datasource protocol. Overview You can implement the Chart Tools Datasource protocol in order to become a data source provider for your own charts, or other charts. Dojo/json. Parse() The parse() function has a single required argument, the JSON string to be parsed, and an optional second argument indicating if secure parsing should always be used. For example: If the target platform supports native JSON parsing, dojo/json will always use the native parser (and serializer). If no native parsing is available, dojo/json will use eval() to parse the JSON. Stringify()
Full Circle Magazine. Home | elementary. Ubuntu. Process XML with the XMLHttpRequest object. The XMLHttpRequest object offers more than just background data processing—it offers full support for working with XML via the XML DOM. Dig deeper into the specifics about working with XML via the XMLHttpRequest object. Last week we reviewed one of the cornerstone elements of AJAX with the XMLHttpRequest object. A simple example demonstrated how you may utilize it to provide a dynamic user interface via a simple lookup utility.
I extend these concepts by processing XML data via HTTP in real time. Processing XML While last week's example displayed the results from a plain text file via the responseText method, the XMLHttpRequest can easily process XML documents as well. A simple example illustrates its usage, but let's review some sample XML first. <? This XML document exists on a test server and the HTML page in Listing A loads it via an XMLHttpRequest object. A few notes on the HTML page: The XML document is loaded via its URL. The XML DOM makes it easy to work with XML data. XML Editor, Data Management, UML, and Web Services Tools from Altova. YUI 2 — Yahoo! User Interface Library. Writing Your Own Data Source - Implementing the Wire Protocol (V. JSON. JSON (/ˈdʒeɪsɒn/ JAY-soun, /ˈdʒeɪsən/ JAY-son), or JavaScript Object Notation, is an open standard format that uses human-readable text to transmit data objects consisting of attribute–value pairs.
It is used primarily to transmit data between a server and web application, as an alternative to XML. Although originally derived from the JavaScript scripting language, JSON is a language-independent data format, and code for parsing and generating JSON data is readily available in a large variety of programming languages. The JSON format was originally specified by Douglas Crockford.
It is currently described by two competing standards, RFC 7159 and ECMA-404. The ECMA standard is minimal describing only the allowed grammar syntax, whereas the RFC also provides some semantic and security considerations.[1] The official Internet media type for JSON is application/json. History[edit] Data types, syntax and example[edit] JSON's basic types are: Data portability issues[edit] Schema and Metadata[edit]
JSON. AJAX Chat and JSON: AJAX and PHP. We are living in a world where communication has become very important and there is a real need to be able to communicate with others. When we talk about communications, we refer to email, phone, postal letters, and online chat. They offer a medium through which a small number of people can exchange thoughtful ideas in form of written words.. Another important aspect when communicating with each other is the responsiveness factor. While emails and letters don't offer a live feedback from the other participants, phone and chat offer a more dynamic way to communicate.
The updated chapter is free and can be downloaded from: [1 MB] AJAX Chat Solutions 250 pages February 2005. How To Build Quick and Simple AJAX Forms with JSON Responses | TutorialSwitch. In this tutorial, we will go through the steps to setting up an AJAX form, which will return a JSON response used to display success/error messages. We will be using jQuery and jQuery Form Plugin to make this entire process very quick and painless.Checkout the DEMO used in this tutorial. Quick overview of the jQuery Form Plugin (from their website): The jQuery Form Plugin allows you to easily and unobtrusively upgrade HTML forms to use AJAX. The main methods, ajaxForm and ajaxSubmit, gather information from the form element to determine how to manage the submit process. Both of these methods support numerous options which allows you to have full control over how the data is submitted.
Submitting a form with AJAX doesn’t get any easier than this! Ok, now that you have some background, lets begin the tutorial! 1. With the jQuery Form Plugin, you can make very complex forms and the plugin has no problem gathering all the form data and sending it over AJAX. 2. <head> ... 3. 4. 5. JavaScript, JSON, AJAX & PHP | Jonathan Hui. Create a JSON Object in JavaScript Access a JSON Object in JavaScript JSON is simply a subset of the literal object of JavaScript Parenthesis can be optional JSON Object with a sub-object JSON Object with an array Serialize and de-serialize a JavaScript Object using JSON Convert a JSON object to a JavaScript string Parse a JavaScript string to a JSON object Use JSON to parse JSON text JSON will strip out any JavaScript code and only recognize JSON data JSON parse provides an optional callback to pre-processing every value inside the JSON object myJSON = JSON.parse(text, function (key, value) { // Pre-processing the value and optional return a new value ... }); Covert text to a JavaScript JSON object with "eval" "eval" can evaluate any JavaScript expression and therefore post security risk if the input data is supplied by user or can be coming from a non-secure channel Receiving JSON data in JQuery Ajax Use JQuery Ajax to parse a Ajax string response to a JavaScript JSON object.
PHP, JSON and JavaScript usage. Today i want to introduce you to jSON (JavaScript Object Notation), in short, it is a simple format designed to exchange data between different programming languages. I will show you how to create JavaScript object, convert it to JSON string, and send to PHP script, which will decode jSON string to readable format (for PHP). But that’s not all, PHP script will create it’s own data object encode it to jSON string and send it back. All communication between JavaScript and PHP will be done thru AJAX. If you haven’t heared about jSON yet, then you can visit Wikipedia for more information.
The other technology you need to be familiar with before reading this article is AJAX. JSON objects Usually when it comes to JSON we have an encoded string in mind, however JSON is a subset of JavaScript and in this programming language it can be used as is, to create objects. Creating JavaScript Objects Before we start, we will need something to work with. Code is quite easy to understand. JSON and PHP. Speeding Up AJAX with JSON. When Microsoft added the ActiveX XMLHTTP object to Internet Explorer's implementation of JavaScript, the company planted the seed for the revolution in Web applications known as Asynchronous JavaScript and XML, or AJAX. Today, Firefox, Safari, Opera, and other browsers all support what is now known as XMLHttpRequest, making possible sites such as colr.org, backpackit.com, and maps.google.com.
These and other sites feature applications that act and feel like other desktop applications—even though they're running in a browser. In AJAX, the JavaScript on the page sends requests to a Web server for data while the user's viewing and interacting with the page (hence the "asynchronous" part of AJAX). Those requests are HTTP requests just like the one the browser used to retrieve the page in the first place, as well as any images, stylesheets, and so forth.
XML is the standard way to interchange data, but it's often not the best way. Fortunately, there's a better way. Welcome to JSON <? An Introduction to JavaScript Object Notation (JSON) in JavaScri. MSDN Library Articles and Overviews Web Applications (ASP.NET) Client-side Development An Introduction to JavaScript Object Notation (JSON) in JavaScript and .NET Design ASP.NET Pages and Controls That Take Advantage of the DHTML Object Model, Part I Design ASP.NET Pages and Controls That Take Advantage of the DHTML Object Model, Part II Injecting Client-Side Script from an ASP.NET Server Control Life Without Refresh Using JavaScript Along with ASP.NET Working with Client-Side Script 311 out of 448 rated this helpful - Rate this topic An Introduction to JavaScript Object Notation (JSON) in JavaScript and .NET An Introduction to JavaScript Object Notation (JSON) in JavaScript and .NET Atif Aziz, Scott Mitchell February 2007 Applies to: JSON Ajax Summary: This article discusses JavaScript Object Notation (or JSON), an open and text-based data exchange format, that provides a standardized data exchange format better suited for Ajax-style web applications. (22 printed pages) Contents Introduction Figure 1.
HTTP requests -- Eloquent JavaScript. ¶ As mentioned in chapter 11, communication on the World Wide Web happens over the HTTP protocol. A simple request might look like this: GET /files/fruit.txt HTTP/1.1 Host: eloquentjavascript.net User-Agent: The Imaginary Browser ¶ Which asks for the file files/fruit.txt from the server at eloquentjavascript.net. In addition, it specifies that this request uses version 1.1 of the HTTP protocol ― version 1.0 is also still in use, and works slightly differently. The Host and User-Agent lines follow a pattern: They start with a word that identifies the information they contain, followed by a colon and the actual information.
These are called 'headers' . ¶ When given the above request, the server might send the following response: HTTP/1.1 200 OK Last-Modified: Mon, 23 Jul 2007 08:41:56 GMT Content-Length: 24 Content-Type: text/plain apples, oranges, bananas ¶ The first line indicates again the version of the HTTP protocol, followed by the status of the request. . ¶ But wait a moment, and... Code Playground. Session Expired Error. Web Analytics.