{"id":1825,"date":"2014-11-12T07:30:00","date_gmt":"2014-11-12T07:30:00","guid":{"rendered":"https:\/\/blogs.msdn.microsoft.com\/typescript\/2014\/11\/12\/announcing-typescript-1-3\/"},"modified":"2024-07-02T12:17:15","modified_gmt":"2024-07-02T20:17:15","slug":"announcing-typescript-1-3","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/typescript\/announcing-typescript-1-3\/","title":{"rendered":"Announcing TypeScript 1.3"},"content":{"rendered":"

We\u2019re happy to announce the availability of TypeScript 1.3. TypeScript 1.3 includes two new features in the language and a new language service for Visual Studio 2015 that is built on the .NET Compiler Platform (\u201cRoslyn\u201d), Visual Studio’s new language service that provides rich Intellisense.\u00a0Roslyn makes it much easier to provide a premier editing experience for TypeScript in Visual Studio on par with the other\u00a0first-class languages in Visual Studio.<\/p>\n

TypeScript 1.3 is available as part of Visual Studio 2015 Preview<\/a>. You can also install it for Visual Studio 2013 via the power tool install<\/a>, NPM<\/a>, and as source<\/a>.<\/p>\n

New Language Features\u00a0<\/span><\/h2>\n

We\u2019ve added two new language features in TypeScript 1.3: the \u201cprotected\u201d access modifier and tuple types.<\/p>\n

The \u201cprotected\u201d access modifier is a\u00a0highly requested feature<\/a>\u00a0that allows users the ability to use build even richer objected-oriented patterns in TypeScript. In this example, you can see how the protected keyword allows subclasses to gain visibility into the parent class without exposing this API to other parts of the code.<\/p>\n

class<\/span> List<\/span><T<\/span>> {<\/span>\n\u00a0 \u00a0 private<\/span>\u00a0contents: T<\/span>[];<\/span>\n\u00a0 \u00a0 constructor<\/span>() {<\/span>\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0this<\/span>.contents = [];<\/span>\n\u00a0 \u00a0 }\nprotected<\/span> setElement(index: number<\/span>, item: T<\/span>) {\nthis<\/span>.contents[index] = item;\n}<\/span><\/p>\n

}<\/span><\/p>\n

class<\/span> Stack<\/span><T<\/span>> extends<\/span> <\/span>List<\/span><T<\/span>> {\n\u00a0 \u00a0 currentIndex: number<\/span>;<\/span><\/p>\n

constructor<\/span>() {\n\u00a0 \u00a0 \u00a0 \u00a0 super<\/span>();\nthis<\/span>.currentIndex = 0;\n}<\/span><\/p>\n

\u00a0 \u00a0 public<\/span> push(item: T<\/span>) {\nthis<\/span>.setElement(this<\/span>.currentIndex, item);\nthis<\/span>.currentIndex++;\n}\n}<\/span><\/p>\n

var<\/span> stack = new<\/span> Stack<\/span><number<\/span>>();\nstack.setElement(0, 1); \/\/ error ‘setElement’ is protected and only visible to subclasses\u00a0<\/span><\/p>\n

Tuple types allow TypeScript to begin typing the new patterns we will see in the upcoming ECMAScript 6 standard<\/a>, where new features like array\u00a0destructuring allow developers to work with arrays in richer ways.\u00a0Tuple types have the advantage that now you can accurately describe the type of an array of mixed types, as in this example:<\/p>\n

var<\/span> tuple: [number<\/span>, string<\/span>] = [1, “bob”<\/span>];\nvar<\/span> secondElement = tuple[1]; \u00a0\/\/ secondElement now has type ‘string’\u00a0<\/span><\/span><\/p>\n

 <\/p>\n

New Visual Studio Features\u00a0<\/span><\/h2>\n

With TypeScript 1.3, we\u2019ve built a new Visual Studio 2015 language service on Roslyn, the compiler platform that’s a part of the open source .NET Foundation<\/a>.\u00a0Roslyn allows us to enable a number of new features for editing TypeScript code.<\/p>\n

 <\/p>\n

Faster and more accurate find all references<\/h2>\n

We have made fundamental changes to how compute and report references. Computing references is now significantly faster on the first attempt. Find All References now also reports locations where a contextual type is present, and reports indexed access to properties.<\/p>\n

\"Image<\/a><\/h2>\n

Enhanced completion list<\/h2>\n

TypeScript now supports the same trigger commit characters as C#, so \u201center\u201d or \u201ctab\u201d \u00a0both commit your selection from the completion list. TypeScript also has completion list filtering based on camel casing.<\/p>\n

\"Image<\/a><\/p>\n

Enhanced outlining<\/h2>\n

With the \u201cRoslyn\u201d language service everything is now collapsible \u2013 \u00a0including functions, object literals, classes, and control flow blocks.<\/p>\n

\"Image<\/a><\/p>\n

Enhanced Colorization<\/h2>\n

Classes, Interfaces, modules,\u00a0enums\u00a0are now colored according to their kind. \u00a0Keywords are also now colorized correctly according to their context.<\/p>\n

\"Image<\/a><\/h2>\n

Peek\u00a0<\/span><\/h2>\n

Editor peek is now available, enabling you to quickly see declarations at a glance complete with colorization.<\/p>\n

\"Image<\/a><\/p>\n

Enhanced rename<\/h2>\n

TypeScript now supports inline rename with even more accuracy than before. Rename finds all instances the name even if it does not have an explicit type annotation \u2013 \u00a0including strings used in property access.<\/p>\n

\"Image<\/a><\/p>\n

TODO comments support<\/h2>\n

 <\/p>\n

TODO comments are now populated in the tasks list.<\/p>\n

\"Image<\/a><\/p>\n

Better support for functional programming style<\/h2>\n

We have made several changes to ensure that our tools work well with different JavaScript coding patterns. Specifically, we’ve improved support for the functional programming style by improving how the editor works with nested functions. Now “Navigate To” shows you nested functions, and the navigation\u00a0bar shows where you are based on your enclosing function scopes.<\/p>\n

\"Image<\/a><\/p>\n

Looking Ahead<\/h2>\n

We’re pleased to enable more coding patterns and improve the Visual Studio experience of working with TypeScript.\u00a0We look\u00a0forward to\u00a0continuing to\u00a0enhance the language and\u00a0tools for working with large-scale JavaScript projects.\u00a0To find out more about what we’ll be working on next, check out our roadmap<\/a>. We encourage you to try out this release and give us your feedback<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

We\u2019re happy to announce the availability of TypeScript 1.3. TypeScript 1.3 includes two new features in the language and a new language service for Visual Studio 2015 that is built on the .NET Compiler Platform (\u201cRoslyn\u201d), Visual Studio’s new language service that provides rich Intellisense.\u00a0Roslyn makes it much easier to provide a premier editing experience […]<\/p>\n","protected":false},"author":377,"featured_media":1797,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-typescript"],"acf":[],"blog_post_summary":"

We\u2019re happy to announce the availability of TypeScript 1.3. TypeScript 1.3 includes two new features in the language and a new language service for Visual Studio 2015 that is built on the .NET Compiler Platform (\u201cRoslyn\u201d), Visual Studio’s new language service that provides rich Intellisense.\u00a0Roslyn makes it much easier to provide a premier editing experience […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/posts\/1825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/users\/377"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/comments?post=1825"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/posts\/1825\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/media\/1797"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/media?parent=1825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/categories?post=1825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/typescript\/wp-json\/wp\/v2\/tags?post=1825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}