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exenv

WebJar for exenv

License

License

BSD 3-Clause
GroupId

GroupId

org.webjars.npm
ArtifactId

ArtifactId

exenv
Last Version

Last Version

1.2.2
Release Date

Release Date
Type

Type

jar
Description

Description

exenv
WebJar for exenv
Project URL

Project URL

http://webjars.org
Source Code Management

Source Code Management

https://github.com/JedWatson/exenv

Download exenv

Filename Size
exenv-1.2.2.pom
exenv-1.2.2.jar 4 KB
exenv-1.2.2-sources.jar 22 bytes
exenv-1.2.2-javadoc.jar 22 bytes
Browse

How to add to project

<!-- https://jarcasting.com/artifacts/org.webjars.npm/exenv/ -->
<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>exenv</artifactId>
    <version>1.2.2</version>
</dependency>
// https://jarcasting.com/artifacts/org.webjars.npm/exenv/
implementation 'org.webjars.npm:exenv:1.2.2'
// https://jarcasting.com/artifacts/org.webjars.npm/exenv/
implementation ("org.webjars.npm:exenv:1.2.2")
'org.webjars.npm:exenv:jar:1.2.2'
<dependency org="org.webjars.npm" name="exenv" rev="1.2.2">
  <artifact name="exenv" type="jar" />
</dependency>
@Grapes(
@Grab(group='org.webjars.npm', module='exenv', version='1.2.2')
)
libraryDependencies += "org.webjars.npm" % "exenv" % "1.2.2"
[org.webjars.npm/exenv "1.2.2"]

Dependencies

There are no dependencies for this project. It is a standalone project that does not depend on any other jars.

Project Modules

There are no modules declared in this project.

exenv

React's ExecutionEnvironment module extracted for use in other packages & components.

Usage

npm install exenv --save

var ExecutionEnvironment = require('exenv');

// You now have...
ExecutionEnvironment.canUseDOM             // is the DOM available? i.e window document etc. 
ExecutionEnvironment.canUseWorkers         // are Web Workers available?
ExecutionEnvironment.canUseEventListeners  // are Events available? i.e addEventListener etc.
ExecutionEnvironment.canUseViewport        // is there a viewport? i.e window.screen

Differences from React's ExecutionEnvironment

The ExecutionEnvironment lib in React 0.13 includes an isInWorker property, which is !canUseDOM. This is highly specific to React internals and probably (a) hacky and (b) not useful to other packages, so it has been left out. Please open an issue with your thoughts if you disagree or have a better idea.

Why?

A number of packages and components use React's private ExecutionEnvironment lib to detect available features, particularly to detect server-side rendering, e.g

canUseDOM = require('react/lib/ExecutionEnvironment').canUseDOM; // BAD

It is bad practice to use React internals and this is likely to be broken / disabled in the future.

Use this package instead!

Versions

Version
1.2.2
1.2.0