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Compilation Object

The Compilation object has many methods and hooks available. On this page, we will list the available methods and properties.

compilation object methods

getStats

function

Returns Stats object for the current compilation.

addModule

function (module, cacheGroup)

Adds a module to the current compilation.

Parameters:

module - module to be added
cacheGroup - cacheGroup of the module

getModule

function (module)

Fetches a module from a compilation by its identifier.

Parameters:

module - module to be fetched. The identifier is extracted from the module by the compilation using module.identifier() method.

findModule

function (module)

Attempts to search for a module by its identifier.

Parameters:

module - module to be searched for. The identifier is extracted from the module by the compilation using module.identifier() method.

waitForBuildingFinished

function (module, callback)

Runs a given callback function when the given module was built.

Parameters:

module - the module at question.
callback - the function to be invoked.

buildModule

function (module, optional, origin, dependencies)

Builds the given module.

Parameters:

module - the module to be built.
optional - optional flag.
origin - origin module from which this module build was requested.
dependencies - optional dependencies of the module to be built.

processModuleDependencies

function (module, callback)

Process the given module dependencies.

Parameters:

module - module to be processed for the dependencies.
callback - function to be invoked when dependencies of the module had been processed.

addModuleDependencies

function (module, dependencies, bail, cacheGroup, recursive, callback)

Adds dependencies to the module. Automatically called by processModuleDependencies after processing dependencies.

Parameters:

module - module to add dependencies to.
dependencies - set of sorted dependencies to iterate through and add to the module.
bail - whether to bail or not when an error occurs.
cacheGroup - cacheGroup of the module.
recursive - whether it is a recursive traversal.
callback - function to invoke after adding the module dependencies.

addEntry

function (context, entry, name, callback)

Adds an entry to the compilation.

Parameters:

context - context path for entry.
entry - entry dependency.
name - the name of entry.
callback - function to be invoked when addEntry finishes.

prefetch

function (context, dependency, callback)

Creates a module from a given dependency.

Parameters:

context - context path.
dependency - the dependency that was used to create the module.
callback - module callback that sends a module up one level.

rebuildModule

function (module, thisCallback)

Triggers a re-build of the module.

Parameters:

module - module to be rebuilt.
thisCallback - function to be invoked when the module finishes rebuilding.

finish

function (callback)

Finishes compilation and invokes the given callback.

Parameters:

callback - function to be invoked when the compilation has been finished.

seal

function (callback)

Seals the compilation.

Parameters:

callback - function to be invoked when the compilation has been sealed.

unseal

function

Unseals the compilation.

Parameters:

callback - function to be invoked when the compilation has been unsealed.

reportDependencyErrorsAndWarnings

function (module, blocks)

Adds errors and warnings of the given module to the compilation errors and warnings.

Parameters:

module - the module whose errors and warnings are to be reported.
blocks - a set of dependency blocks to report from.

addChunkInGroup

function (groupOptions, module, loc, request)

Adds module to an existing chunk group or creates a new one. Returns a chunkGroup.

Parameters:

groupOptions - options for the chunk group.
module - a module that references the chunk group.
loc - the location from which the chunk group is referenced (inside of the module).
request - the request from which the chunk group is referenced.

addChunk

function (name)

Creates and adds a new chunk to the compilation.chunks. Returns that chunk.

Parameters:

name - the name of the chunk.

assignDepth

function (module)

Assigns depth to the given module and its dependency blocks recursively.

Parameters:

module - the module to assign depth to.

getDependencyReference

function (module, dependency)

Returns the reference to the dependency from a given module.

Parameters:

module - the module at question.
dependency - the dependency to get reference to.

processDependenciesBlocksForChunkGroups

function (inputChunkGroups)

Creates the Chunk graph from the Module graph. The process is done in two phases. Phase one: traverse the module graph and build a basic chunks graph in chunkDependencies. Phase two: traverse every possible way through the basic chunk graph and track the available modules. While traversing, processDependenciesBlocksForChunkGroups connects chunks with each other and Blocks with Chunks. It stops traversing when all modules for a chunk are already available and it doesn't connect unneeded chunks.

Parameters:

inputChunkGroups - chunk groups that are processed.

removeReasonsOfDependencyBlock

function (module, block)

Removes relation of the module to the dependency block.

Parameters:

module - a module relationship to be removed.
block - dependency block.

patchChunksAfterReasonRemoval

function (module, chunk)

Patches ties of module and chunk after removing dependency reasons. Called automatically by removeReasonsOfDependencyBlock.

Parameters:

module - a module to patch tie.
chunk - a chunk to patch tie.

removeChunkFromDependencies

function (block, chunk)

Removes given chunk from a dependencies block module and chunks after removing dependency reasons. Called automatically by removeReasonsOfDependencyBlock.

Parameters:

block - block tie for Chunk.
chunk - a chunk to remove from dependencies.

sortItemsWithModuleIds

function

sortItemsWithChunkIds

function

summarizeDependencies

function

createHash

function

createModuleAssets

function

createChunkAssets

function

getPath

function (filename, data)

Returns the interpolated path.

Parameters:

filename - used to get asset path with hash.
data - data object.

getPathWithInfo

function (filename, data)

Returns interpolated path and asset information.

Parameters:

filename - used to get asset path with hash.
data - data object.

createChildCompiler

function (name, outputOptions, plugins)

Allows running another instance of webpack inside of webpack. However, as a child with different settings and configurations applied. It copies all hooks and plugins from the parent (or top-level compiler) and creates a child Compiler instance. Returns the created Compiler.

Parameters: