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112 lines
2.8 KiB
Markdown
112 lines
2.8 KiB
Markdown
7 years ago
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# combine-source-map [](http://travis-ci.org/thlorenz/combine-source-map)
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Add source maps of multiple files, offset them and then combine them into one source map.
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```js
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var convert = require('convert-source-map');
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var combine = require('combine-source-map');
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var fooComment = '//# sourceMappingURL=data:application/json;base64,eyJ2Z [..] pzJylcbiJdfQ==';
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var barComment = '//# sourceMappingURL=data:application/json;base64,eyJ2Z [..] VjaycpXG4iXX0=';
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var fooFile = {
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source: '(function() {\n\n console.log(require(\'./bar.js\'));\n\n}).call(this);\n' + '\n' + fooComment
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, sourceFile: 'foo.js'
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};
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var barFile = {
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source: '(function() {\n\n console.log(alert(\'alerts suck\'));\n\n}).call(this);\n' + '\n' + barComment
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, sourceFile: 'bar.js'
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};
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var offset = { line: 2 };
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var base64 = combine
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.create('bundle.js')
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.addFile(fooFile, offset)
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.addFile(barFile, { line: offset.line + 8 })
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.base64();
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var sm = convert.fromBase64(base64).toObject();
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console.log(sm);
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```
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```
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{ version: 3,
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file: 'bundle.js',
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sources: [ 'foo.coffee', 'bar.coffee' ],
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names: [],
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mappings: ';;;AAAA;CAAA;CAAA,CAAA,CAAA,IAAO,GAAK;CAAZ;;;;;ACAA;CAAA;CAAA,CAAA,CAAA,IAAO,GAAK;CAAZ',
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sourcesContent:
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[ 'console.log(require \'./bar.js\')\n',
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'console.log(alert \'alerts suck\')\n' ] }
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```
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## Installation
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npm install combine-source-map
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## API
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### create()
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```
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/**
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* @name create
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* @function
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* @param file {String} optional name of the generated file
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* @param sourceRoot { String} optional sourceRoot of the map to be generated
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* @return {Object} Combiner instance to which source maps can be added and later combined
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*/
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```
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### Combiner.prototype.addFile(opts, offset)
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```
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/**
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* Adds map to underlying source map.
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* If source contains a source map comment that has the source of the original file inlined it will offset these
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* mappings and include them.
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* If no source map comment is found or it has no source inlined, mappings for the file will be generated and included
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*
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* @name addMap
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* @function
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* @param opts {Object} { sourceFile: {String}, source: {String} }
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* @param offset {Object} { line: {Number}, column: {Number} }
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*/
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```
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### Combiner.prototype.base64()
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```
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/**
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* @name base64
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* @function
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* @return {String} base64 encoded combined source map
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*/
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```
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### Combiner.prototype.comment()
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```
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/**
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* @name comment
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* @function
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* @return {String} base64 encoded sourceMappingUrl comment of the combined source map
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*/
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```
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### removeComments(src)
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```
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/**
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* @name removeComments
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* @function
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* @param src
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* @return {String} src with all sourceMappingUrl comments removed
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*/
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```
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## Example
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Read and run the [more elaborate example](https://github.com/thlorenz/combine-source-map/blob/master/example/two-files.js)
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in order to get a better idea how things work.
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