As we’ve discussed in the past , Microsoft has been actively involved in the developing the specification for the next revision of the JavaScript standard, ECMAScript Fifth Edition. We expect that after ECMAScript 5’s completion and formal adoption later...

UPDATE Microsoft has released an update that addresses most of the issues discussed below. Refer KB976662 for more information about the update. The MSDN links for JSON documentation - JSON.stringify , JSON.parse and toJSON , have also been updated to...

With native JSON support enabled in IE8, users can now take advantage of the built-in JSON.stringify and JSON.parse methods to serialize and deserialize JScript values to JSON text and vice versa. However, there is a known issue in IE8’s native JSON implementation...

With Internet Explorer 8 we introduced several new JScript language features including native JSON support and accessor methods for Mutable DOM prototypes. Of course, any new language feature introduces compatibility risk and one of the main pieces of...

In the world of web standards, JavaScript is known as ECMAScript and maintenance of its definition is the responsibility of the Ecma International standards organization. The ECMAScript standard was last updated in 1999, so it is quite significant that...

During Beta1 and Beta2 pre-releases of IE8, we’ve blogged about the performance optimizations done in the Script engine and the addition of new language features such as native JSON support . We also provided details about the JScript Debugger and the...

Internet Explorer 8 Final is now available in 25 languages. IE8 makes what real people do on the web every day faster, easier, and safer. Anyone running Windows Vista, Windows XP, and Windows Server can get 32-bit and 64-bit versions now from http...

Internet Explorer 8 Release Candidate Is Now Available . Here is post that would help you Upgrade to Internet Explorer 8 Release Candidate 1 . Note: The comments on this blog are blocked. Pl post your comments on the IE team blog , so that...

In Internet Explorer 8 Beta 2 JScript team has focused on improving developer productivity. You can read 'What’s new in JScript for IE8 Beta 2' and check out the JScript PM Channel 9 video to learn more. As part of our focus on developer productivity...

The 4 th episode of the Open Web Podcast featured Allen, Pratap , Dion, and John discussing the Open Web, ECMAScript, IE 8 and more. A recording of the discussion has been published. Enjoy!

The current ECMAScript specification was completed in 1999 and certainly needed to be updated to reflect today’s web environment and practices. Some participants in the standards process wanted to use what they thought of as a once-in-a-decade opportunity...

Hello Friends, Today I am going to talk about some of the Garbage Collector improvement we have done. Actually the original fix was done in Script 5.7 (shipped with IE7/Vista and also available on down level platforms ), which we further enhanced in JScript...

Hello Friends, Hope you have read part I of this topic which I posted few days ago. If not then I would suggest going through that first as this post is just a continuation of that one. So coming to the point, here is the second reason - 2. “JavaScript...

I am Titus working as a SDET in JScript team. Sometime back I came across a situation where the requirement was to pass a XML file and get a Tree Listing back. The Tree Listing should have all nodes in the file along with proper parent/child relationship...

Hello Friends, Have you observed better performance of Array operations in IE8 than IE7? If not, try the following code in both IE7 & IE8 and I can bet you would not leave this page without reading till the last word. var arrObj = new Array(); var...

Hello Friends, Have you read my post on the String Concatenation issue? If yes, then I can sense your curiosity to know a little bit more about what went on behind the scenes. For example, what is the new algorithm used to get to the performance results...

IE8 Beta1 (download available here ) now includes a Script debugger that is part of IE8 Developer Tools. This Script debugger was built by the JScript team and I hope you have been using it to fix all script errors when building your web applications...

As Shreesh mentioned in his blog , Internet Explorer 8 has a built-in JScript debugger. With Internet Explorer Developer Tools you get a light weight JScript debugger that is well integrated in the browser and available out of the box. This is an in-proc...

Making developers more productive through the design, development, and debug phases of web application development is one of the key goals for Internet Explorer 8. I’d like to take this opportunity to walk you through the features that the JScript team...

We are constantly looking to engage with our customers on this blog and understand their pain-points, and in that spirit, it was really heartening to see the blog post by Mark Mader from Smartsheet . The JScript team is very appreciative of this kind...

Now Visual Studio 2008 code named Orcas is out of door with incredible features. T he most highly anticipated feature of this release is JScript Authoring Services which includes JavaScript Intellisense and JavaScript Syntax Checking . In the final...

Sometime back Don blogged about Windows Script 5.7 release . We got lots of feedback on this, people asked for making this as an automatic update and support for 64 bit platform. The good news is that we have heard you. The biggest fix in JScript was...

A mashup composes a web application by combining programs and data services from multiple originators, and delivers it for presentation on a single web page. Usually, these programs and services interact with each other - housing maps being the canonical...

Since we release JSript intellisense in Visual Studio 2008 Beta 2, there has been some queries on why JScript intellisense behaves in a certain way. I wish to tell you that intellisense in a dynamic language like JScript is based on certain heuristics...

In this post I will be discussing how one can achieve Class Hierarchy and Data Encapsulation in JScript . I will take the same example that was used for the first and second parts and will keep updating it as and when required. function Rectangle...