A karma-runner plugin to compile typescript files on the fly.
npm install karma-typescript-preprocessor> Preprocessor to compile TypeScript on the fly.
``bash`
npm install karma-typescript-preprocessor --save-dev
The code below shows the sample configuration of the preprocessor.
`js
// karma.conf.js
module.exports = function(config) {
config.set({
preprocessors: {
'*/.ts': ['typescript']
},
typescriptPreprocessor: {
// options passed to the typescript compiler
options: {
sourceMap: false, // (optional) Generates corresponding .map file.
target: 'ES5', // (optional) Specify ECMAScript target version: 'ES3' (default), or 'ES5'
module: 'amd', // (optional) Specify module code generation: 'commonjs' or 'amd'
noImplicitAny: true, // (optional) Warn on expressions and declarations with an implied 'any' type.
noResolve: true, // (optional) Skip resolution and preprocessing.
removeComments: true, // (optional) Do not emit comments to output.
concatenateOutput: false // (optional) Concatenate and emit output to single file. By default true if module option is omited, otherwise false.
},
// transforming the filenames
transformPath: function(path) {
return path.replace(/\.ts$/, '.js');
}
}
});
};
`
If you set the sourceMap option to true` then the generated source map will be inlined as a data-uri.
All TypeScript compiler options are defined here.
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For more information on Karma see the homepage.