42 lines
939 B
Markdown
42 lines
939 B
Markdown
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# vinyl-sourcemaps-apply
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Apply a source map to a vinyl file, merging it with preexisting source maps.
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## Usage:
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```javascript
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var applySourceMap = require('vinyl-sourcemaps-apply');
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applySourceMap(vinylFile, sourceMap);
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```
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### Example (Gulp plugin):
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```javascript
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var through = require('through2');
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var applySourceMap = require('vinyl-sourcemaps-apply');
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var myTransform = require('myTransform');
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module.exports = function(options) {
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function transform(file, encoding, callback) {
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// generate source maps if plugin source-map present
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if (file.sourceMap) {
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options.makeSourceMaps = true;
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}
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// do normal plugin logic
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var result = myTransform(file.contents, options);
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file.contents = new Buffer(result.code);
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// apply source map to the chain
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if (file.sourceMap) {
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applySourceMap(file, result.map);
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}
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this.push(file);
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callback();
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}
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return through.obj(transform);
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};
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```
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