Not able to Generate istanbul coverage in json format

[bharathmuppa]

I have the following karma configuration and I expect coverage folder to be created with JSON format. But the default HTML report is being generated instead of JSON.

Versions of packages

"karma-typescript": "5.1.0",
"karma": "5.1.1",
"karma-browserstack-launcher": "1.3.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "3.0.3",
"karma-jasmine": "4.0.1",
"karma-jasmine-html-reporter": "1.5.4"

karma.conf.js

module.exports = function(config) {
    config.set({
        frameworks: ['polyfill', 'jasmine', 'karma-typescript'],

        files: [
            { pattern: '../**/*.ts' }
        ],

        exclude: ['../core/**/*.spec.ts', '../ng-core-containers/**/*', '../ng-core-services/**/*'],

        logLevel: config.LOG_INFO,

        preprocessors: {
            '../**/*.ts': ['karma-typescript']
        },

        reporters: ['progress', 'ipf', 'karma-typescript'],

        ipfReporter: {
            outputFile: '../../Output/tests/integration/core-integration.Results.xml',
            suite: 'core-integration',
            component: 'WebAde',
            isJasmine: true
        },
        polyfill: [
            'Promise',
            'Array.prototype.find',
            'Array.prototype.findIndex',
            'Array.from',
            'Math.sign',
            'Function.name'
        ],
        browsers: ['Chrome'],
        karmaTypescriptConfig: {
            // coverageReporter: {
            //     instrumenterOptions: {
            //         istanbul: { noCompact: false }
            //     }
            // },
            reporters: {
                json: {
                    directory: 'coverage-json', // optional, defaults to 'coverage'
                    subdirectory: 'json', // optional, defaults to the name of the browser running the tests
                    filename: 'coverage.json' // optional, defaults to the report name
                }
            },
            include: ['../**/*.ts'],
            exclude: ['../core/**/*.spec.ts'],
            tsconfig: './tsconfig.spec.json',
            compilerOptions: {
                module: 'commonjs'
            }
        },
        singleRun: true,
        client: {
            captureConsole: false
        }
    });
};

[erikbarke]

There's a typo in your config, reporters: {... should be reports: {... 🚀