webpack-sources
Source code handling classes for webpack
Last updated 2 months ago by sokra .
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webpack-sources

Contains multiple classes which represent a Source. A Source can be asked for source code, size, source map and hash.

Source

Base class for all sources.

Public methods

All methods should be considered as expensive as they may need to do computations.

source

Source.prototype.source() -> String | ArrayBuffer

Returns the represented source code as string.

size

Source.prototype.size() -> Number

Returns the size in chars of the represented source code.

map

Source.prototype.map(options: Object) -> Object | null

Returns the SourceMap of the represented source code as JSON. May return null if no SourceMap is available.

The options object can contain the following keys:

  • columns: Boolean (default true): If set to false the implementation may omit mappings for columns.
  • module: Boolean (default true): If set to false the implementation may omit inner mappings for modules.

sourceAndMap

Source.prototype.sourceAndMap(options: Object) -> {
	source: String,
	map: Object
}

Returns both, source code (like Source.prototype.source() and SourceMap (like Source.prototype.map()). This method could have better performance than calling source() and map() separately.

See map() for options.

updateHash

Source.prototype.updateHash(hash: Hash) -> void

Updates the provided Hash object with the content of the represented source code. (Hash is an object with an update method, which is called with string values)

node (optional)

Source.prototype.node(options: Object) -> SourceNode

This is an optional method. It may be null if not implemented.

Returns a SourceNode (see source-map library) for the represented source code.

See map() for options.

listNode (optional)

Source.prototype.listNode(options: Object) -> SourceNode

This is an optional method. It may be null if not implemented.

Returns a SourceListMap (see source-list-map library) for the represented source code.

See map() for options.

RawSource

Represents source code without SourceMap.

new RawSource(sourceCode: String)

OriginalSource

Represents source code, which is a copy of the original file.

new OriginalSource(
	sourceCode: String,
	name: String
)
  • sourceCode: The source code.
  • name: The filename of the original source code.

OriginalSource tries to create column mappings if requested, by splitting the source code at typical statement borders (;, {, }).

SourceMapSource

Represents source code with SourceMap, optionally having an additional SourceMap for the original source.

new SourceMapSource(
	sourceCode: String,
	name: String,
	sourceMap: Object | String,
	originalSource?: String,
	innerSourceMap?: Object | String,
	removeOriginalSource?: boolean
)
  • sourceCode: The source code.
  • name: The filename of the original source code.
  • sourceMap: The SourceMap for the source code.
  • originalSource: The source code of the original file. Can be omitted if the sourceMap already contains the original source code.
  • innerSourceMap: The SourceMap for the originalSource/name.
  • removeOriginalSource: Removes the source code for name from the final map, keeping only the deeper mappings for that file.

The SourceMapSource supports "identity" mappings for the innerSourceMap. When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to keep finer mappings from sourceMap.

LineToLineMappedSource

Represents source code, which is mapped line by line to the original file.

new LineToLineMappedSource(
	sourceCode: String,
	name: String,
	originalSource: String
)
  • sourceCode: The source code.
  • name: The filename of the original source code.
  • originalSource: The original source code.

CachedSource

Decorates a Source and caches returned results of map, source, size and sourceAndMap in memory. Every other operation is delegated to the wrapped Source.

new CachedSource(source: Source)

PrefixSource

Prefix every line of the decorated Source with a provided string.

new PrefixSource(
	prefix: String,
	source: Source
)

ConcatSource

Concatenate multiple Sources or strings to a single source.

new ConcatSource(
	...items?: Source | String
)

Public methods

add

ConcatSource.prototype.add(item: Source | String)

Adds an item to the source.

ReplaceSource

Decorates a Source with replacements and insertions of source code.

The ReplaceSource supports "identity" mappings for child source. When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to split mappings at replacements/insertions.

Public methods

replace

ReplaceSource.prototype.replace(
	start: Number,
	end: Number,
	replacement: String
)

Replaces chars from start (0-indexed, inclusive) to end (0-indexed, inclusive) with replacement.

Locations represents locations in the original source and are not influenced by other replacements or insertions.

insert

ReplaceSource.prototype.insert(
	pos: Number,
	insertion: String
)

Inserts the insertion before char pos (0-indexed).

Location represents location in the original source and is not influenced by other replacements or insertions.

original

Get decorated Source.

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