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closure-compiler

Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.
https://developers.google.com/closure/compiler/
parses google common docs about checks used warns references search minimizes pitfalls rewrites gmail left dead types javascript your code analyzes optimizing many syntax including what maps removes apps closure compiler variable also
Files download
File Operation
closure-compiler-v20140625.jar download
closure-compiler-v20140625.pom download
closure-compiler-v20140625-sources.jar download
Apache Maven 
<dependency>
  <groupId>com.google.javascript</groupId>
  <artifactId>closure-compiler</artifactId>
  <version>v20140625</version>
</dependency>
Gradle Groovy 
implementation 'com.google.javascript:closure-compiler:v20140625'
Gradle Kotlin 
implementation("com.google.javascript:closure-compiler:v20140625")
Scala SBT 
libraryDependencies += "com.google.javascript" % "closure-compiler" % "v20140625"
Groovy Grape 
@Grapes(
  @Grab(group='com.google.javascript', module='closure-compiler', version='v20140625')
)
Apache Ivy 
<dependency org="com.google.javascript" name="closure-compiler" rev="v20140625" />
Leiningen 
[com.google.javascript/closure-compiler "v20140625"]
Apache Buildr 
'com.google.javascript:closure-compiler:jar:v20140625'
Dependencies 
<parent>
  <groupId>com.google.javascript</groupId>
  <artifactId>closure-compiler-parent</artifactId>
  <version>v20140625</version>
</parent>

compile

|-- com.google.javascript:closure-compiler-externs:v20140625

|-- args4j:args4j:2.0.26

|-- com.google.guava:guava:17.0

|-- com.google.protobuf:protobuf-java:2.5.0

|-- org.json:json:20090211

|-- com.google.code.findbugs:jsr305:1.3.9

test

|-- junit:junit:4.11

|-- org.mockito:mockito-core:1.9.5