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