JScript Blog

Blogs from the JScript team in Microsoft

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  • Blog Post: Steps Toward Creating Compatible ECMAScript 5 Implementations

    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 this year that it will be relatively quickly adopted...
  • Blog Post: Native JSON Support in IE8 and Tracking the ECMAScript Fifth Edition Draft Specification

    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 reflect these changes. Suresh Jayabalan, Program...
  • Blog Post: Versioning Language Features in JScript

    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 feedback we received was that we needed to provide...
  • Blog Post: A Major Milestone in JavaScript Standardization

    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 Ecma has announced that it has completed development...
  • Blog Post: What’s new in JScript for IE8

    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 JScript Profiler – that shipped as part IE8 Developer...
  • Blog Post: Internet Explorer 8 Release Candidate Now Available

    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 they can be collated at one place. Gaurav Seth...
  • Blog Post: JScript Debugger in Internet Explorer 8 Beta 2

    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 we have continued to invest in the IE8 Developer Tools...
  • Blog Post: GC Improvements in JScript for Internet Explorer 8 Beta 1

    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 shipped with IE8 Beta1. So if you have gone...
  • Blog Post: Performance Optimization of Arrays - Part II

    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 arrays are sparse arrays” – JavaScript...
  • Blog Post: Reading XML File With JScript

    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 as well as a good way to differentiate between...
  • Blog Post: Insight into String Concatenation in JScript

    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 projected in the blog, what were the issues...
  • Blog Post: IE8 Script Debugger - Under the Hood

    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. In this post I will be discuss the design of the...
  • Blog Post: JScript Debugger in Internet Explorer 8

    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 debugger making sure that you don’t have to launch...
  • Blog Post: JScript in Internet Explorer 8 Beta 1 for Developers

    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 contributed to IE8 Beta 1 for Developers. Let...
  • Blog Post: Thank you - Smartsheet !

    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 of customer engagement and hope more customers frequent...
  • Blog Post: ECMAScript 3 and beyond

    The web has become the primary global computing platform tying together hundreds of millions of sites. In the eight years since the release of the ECMAScript Language Specification 3rd Edition (ES3), ECMAScript (commonly known as JavaScript™ or JScript ™) has grown in importance as one of the key technologies...
  • Blog Post: Performance issues with "String Concatenation" in JScript.

    Hello Friends, I am Jaiprakash and work as a Developer in the Jscript team. There is not much to tell about me except one fact - I can’t recall the last time when any of my teammates called me by my name, they just call me JP J . I know, you have seen pretty cool blogs in past from my team mates and...
  • Blog Post: Appropriate forums to ask questions regarding JScript.

    We have created new forum for asking questions related to JScript. The forum link is given below: http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=1861&SiteID=1 JScript.NET questions http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=47&SiteID=1 Managed JScript that ships...
  • Blog Post: Automatic Update for JScript which is part Windows Script 5.7 release

    There has been some request and suggestion that when the JScript team feels that there are so many advantages of JScript update which went as part of Windows Script 5.7 release, why this is not being pushed as part of Windows Automatic Update. Well, we do agree that making the JScript DLL (which is part...
  • Blog Post: JScript - Managed or Native, JavaScript, ECMAScript - What's what? And references ...

    Being a late entrant into the group, I always had questions regarding what’s what of JScript - Managed or Native, JavaScript, ECMAScript. Though I could find quite a lot of information at varied places, I thought it might be a good idea to compile a small blog around the subject – so that we have the...
  • Blog Post: Regular Expression optimization done in Jscript 5.7 release

    I modified my last blog many times. I was really amazed at the kind of response I got on this blog. Thanks for taking time and putting all the comments. Today I am going to talk at length the "Regular Expression" optimization we did in JScript that shipped with Windows Script 5.7 release. I could have...
  • Blog Post: Windows Script 5.7 released for Windows 2000, Windows XP and Windows 2003 Server

    I have little announcement to make today. Windows Script 5.7 which ships with different flavors of Windows® Vista is now available for Windows® 2000/XP as well as Windows® 2003 Server. This download will install Microsoft® Windows® Script containing Visual Basic® Script Edition (VBScript.) Version...
  • Blog Post: Visual Studio 2008 Beta 2 Released!

    You probably know by now. Microsoft has announced the release of Visual Studio 2008 Beta 2 and Visual Web Developer 2008 Beta 2 . The release incorporates improvments to Javascript intellisense, apart from making Javascript errors available through the error tab. I will probably write more on this later...
  • Blog Post: Using Jscript based IE Add-On to export data from any website

    Often times we browse to a website which has lot of data in tabular format, or we login to secure website which displays data like financial transactions etc. in a neatly formated tabular format. Sometimes we have a need to export such data into another tool, if the website supports such an export good...
  • Blog Post: Introducing Managed JScript

    It's finally released and I can blog about it. Have been waiting to write about it for some time now and now that it’s out, can talk about it. Scott Guthrie in his keynote at MIX this week, announced that we are implementing a new version of JSscript implementation to run on top of the .NET platform...
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