Faster Babel 7 compiler debuts for JavaScript, TypeScript
Close Ad
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("gpt-overlay", "true");
IDG.GPT.displayGoogleTagSlot('gpt-overlay');
);
Close Ad
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("gpt-overlay", "true");
IDG.GPT.displayGoogleTagSlot('gpt-overlay');
);
Close Ad
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("gpt-overlay", "true");
IDG.GPT.displayGoogleTagSlot('gpt-overlay');
);
infoworld
<!--

-->

Sign In | Register
- What’s new in Apple’s Swift 4.2 language
- How to transition to a microservices architecture
- Python virtualenv and venv do’s and don’ts
- How to secure your PostgreSQL database
More Insider
Sign Out
$('.signin-register').hide();
$('#welcome-message').hide();
infoworld
<!--

-->

Sign In | Register
- What’s new in Apple’s Swift 4.2 language
- How to transition to a microservices architecture
- Python virtualenv and venv do’s and don’ts
- How to secure your PostgreSQL database
More Insider
Sign Out
- What’s new in Apple’s Swift 4.2 language
- How to transition to a microservices architecture
- Python virtualenv and venv do’s and don’ts
- How to secure your PostgreSQL database
More Insider
Sign Out
- What’s new in Apple’s Swift 4.2 language
- How to transition to a microservices architecture
- Python virtualenv and venv do’s and don’ts
- How to secure your PostgreSQL database
More Insider
Sign Out
- What’s new in Apple’s Swift 4.2 language
- How to transition to a microservices architecture
- Python virtualenv and venv do’s and don’ts
- How to secure your PostgreSQL database
More Insider
Sign Out
More Insider
Sign Out
$(document).ready(function()
$('a[data-link]').click(function()
//get this link's dataLink value
var dataLink = $(this).attr('data-link');
//select the div with the same value
var toKeep = 'div[data-link="'+dataLink+'"]';
//select data-link divs that are not the above div
$('div[data-link]').not(toKeep).hide();
if($(this).hasClass('link-transition'))
$(toKeep).fadeIn(800);
else
$(toKeep).show();
//prevent location change
return false;
);
);
$(document).ready(function()
$('a[data-link]').click(function()
//get this link's dataLink value
var dataLink = $(this).attr('data-link');
//select the div with the same value
var toKeep = 'div[data-link="'+dataLink+'"]';
//select data-link divs that are not the above div
$('div[data-link]').not(toKeep).hide();
if($(this).hasClass('link-transition'))
$(toKeep).fadeIn(800);
else
$(toKeep).show();
//prevent location change
return false;
);
);
$(document).ready(function()
$('a[data-link]').click(function()
//get this link's dataLink value
var dataLink = $(this).attr('data-link');
//select the div with the same value
var toKeep = 'div[data-link="'+dataLink+'"]';
//select data-link divs that are not the above div
$('div[data-link]').not(toKeep).hide();
if($(this).hasClass('link-transition'))
$(toKeep).fadeIn(800);
else
$(toKeep).show();
//prevent location change
return false;
);
);
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("ticker", "true");
$('#ticker').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: ticker - [971 1115]");
);
Faster Babel 7 compiler debuts for JavaScript, TypeScript
But TypeScript is not fully supported, and Babel 7 does break some existing code
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("topleaderboard", "true");
$('#topleaderboard').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: topleaderboard - [971 1115]");
);

Deavmi
(CC BY-SA 3.0)
consent.ads.queue.push(function()
if($(window).width() >= 930)
IDG.GPT.addDisplayedAd("topimu", "true");
$('#topimu').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: topimu - [971 1115]");
);
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("inread", "true");
IDG.GPT.displayGoogleTagSlot('inread');
);
var dataLayer = window.dataLayer = window.dataLayer || ;
dataLayer.push(
'event': 'loadTopCollectionModule'
);
$(document).ready(function() {
$('.articleBloxAd').filter( ":visible" ).each(function(index, item) {
var id = $(item).attr('id');
var divClass = $(item).attr('class');
var adString = IDG.GPT.getLazyAdCode();
$(item).replaceWith("
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("ticker", "true");
$('#ticker').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: ticker - [971 1115]");
);
Thank you
Your message has been sent.
Sorry
There was an error emailing this page.
To
Use commas to separate multiple email addresses
From
Privacy Policy
Thank you
Your message has been sent.
Sorry
There was an error emailing this page.
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("topleaderboard", "true");
$('#topleaderboard').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: topleaderboard - [971 1115]");
);

Deavmi
(CC BY-SA 3.0)

What’s new in TypeScript 3.1

Vue JavaScript CLI tool gets a rewrite

What’s new in Microsoft Visual Studio Code

Video
R tip: Schedule R scripts on a Mac
consent.ads.queue.push(function()
if($(window).width() >= 930)
IDG.GPT.addDisplayedAd("topimu", "true");
$('#topimu').responsiveAd(screenSize:'971 1115', scriptTags: );
IDG.GPT.log("Creating ad: topimu - [971 1115]");
);
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("inread", "true");
IDG.GPT.displayGoogleTagSlot('inread');
);
Babel 7, an upgrade to the JavaScript compiler two years in the making, is now available, with speed improvements and TypeScript support.
The faster Babel should reduce build times. Changes have been made to optimize code. Patches have been accepted from Google’s V8 JavaScript engine team.
Also, Babel now ships with TypeScript support. You parse type syntax using @babel/preset-typescript, similar to how Babel has handled the Flow static type checker. But Babel does not do type-checking on TypeScript code; it only transforms the code and will compile regardless of which type errors might be present. Babel does transform the latest JavaScript features to older runtimes and browsers.
Other capabilities in Babel 7 include:
- The
babel-upgradetool, for automatically dealing with breaking changes. The tool has dependencies inpackage.jsonandbabelrcconfig. The Babel team recommends running it directly on a Git repo withnpx babel-upgrade, or you can installed it directly withnpm i babel-upgrade –g. - For JavaScript configuration files, there is now
babel.js.config. These files are common in the JavaScript ecosystem. - Selective configurations are enabled via
overrides, for specifying different configs per glob. - Changes have been made to the
looseoption of some plugins, while new options have been added to others. But using these options opts the developer into non-spec-compliant behavior. This can become an issue when switching off of compiling to use the syntax natively. - Automatic polyfilling is featured, in an experimental fashion. Polyfills are needed for features such as
Promiseandsymbolin environments that do not support them. This is important when differentiating between what Babel does as a compiler vs. a polyfill. - The
calleroption has been added to@babel/coreso tools can pass metadata to presets and plugins.
Babel 7 does break several existing capabilities:
- It drops support for unmaintained Node Versions 0.10, 0.12, 4, 5.
- It introduces the
peerDependencyon@babel/corefor certain user-facing packages, such asbabel-loaderandbabel-cli. - It moves to the
@babelnamespace by switching to “scoped” packages. This helps differentiate official packages sobabel-corebecomes@babel/core. - JSX Fragment support is available, as it has been since beta 31.
Planned features for future versions include:
- Plugin ordering.
- Better validation and error messages.
- Asynchronous use of Babel.
Where to download Babel 7
You can download Babel 7 from babeljs.io.
Stay up to date with InfoWorld’s newsletters for software developers, analysts, database programmers, and data scientists.
Get expert insights from our member-only Insider articles.
<!--
document.write('');
consent.ads.queue.push(function()
IDG.GPT.addDisplayedAd("ciu", "true");
IDG.GPT.addLazyloadedAd("ciu", "true");
);
document.write('');
consent.ads.queue.push(function()
$('#ciu').responsiveAd(screenSize:'971 1115', scriptTags: );
if (Object.keys(IDG.GPT.companions).length > 0 );
//-->
Copyright © 2018 IDG Communications, Inc.
- CIO
- CIO Asia
- Computerworld
- CSO
- GameStar
- Greenbot
- IDC
- IDG
- IDG Connect
- IDG.TV
- InfoWorld
- IT News
- ITwhitepapers
- ITworld
- JavaWorld
- Macworld
- Network World
- PCWorld
- TechConnect
- TechHive
- The Full Nerd
- CIO
- CIO Asia
- Computerworld
- CSO
- GameStar
- Greenbot
- IDC
- IDG
- IDG Connect
- IDG.TV
- InfoWorld
- IT News
- ITwhitepapers
- ITworld
- JavaWorld
- Macworld
- Network World
- PCWorld
- TechConnect
- TechHive
- The Full Nerd
- CIO
- CIO Asia
- Computerworld
- CSO
- GameStar
- Greenbot
- IDC
- IDG
- IDG Connect
- IDG.TV
- InfoWorld
- IT News
- ITwhitepapers
- ITworld
- JavaWorld
- Macworld
- Network World
- PCWorld
- TechConnect
- TechHive
- The Full Nerd

Clash Royale CLAN TAG#URR8PPP