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Choose an HTML report workflow
WebdriverIO’s reporters setting accepts reporter names or entries containing a reporter name and options. HTML output comes from an integration package, and its documentation determines how to configure and generate the file. WebdriverIO identifies its JSON HTML and HTML Nice reporter pages as third-party integrations, so check the package’s current compatibility and instructions against your project’s WebdriverIO version and lockfile before installing it.
| Need | Documented approach | What to plan for |
|---|---|---|
| Convert collected JSON into an HTML dashboard | wdio-json-html-reporter reporter plus HTMLReportGenerator, or its CLI |
Generation is a separate conversion step after test execution. |
| Create a master report across suites | wdio-html-nice-reporter with ReportGenerator in onComplete |
Configure aggregation deliberately; parallel workers do not universally combine output automatically. |
| Keep run history or trends | Optional history in JSON HTML Reporter, or history-related settings in Serenity/JS HTML Reporter | Choose history behavior and storage to suit the team’s reporting needs. |
| Include execution evidence | JSON HTML screenshots, Allure trace artifacts, or video reporter integrations | These are optional additions, not prerequisites for basic HTML output. |
Sources: JSON HTML Reporter, HTML Reporter, Serenity/JS HTML Reporter, DevTools / Allure integration, and Video Reporter.
Generate HTML from JSON results
The JSON HTML Reporter workflow has two stages: configure the reporter to collect JSON results, then convert the output folder to an HTML file after the run. The following shows the documented shape; align the import and option names with the package version you install.
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// wdio.conf.js — adapt paths and options to your installed package version
const { JSONReporter, HTMLReportGenerator } = require('wdio-json-html-reporter');
exports.config = {
// Keep your existing WebdriverIO configuration here.
reporters: [
[JSONReporter, {
outputFile: './reports/json/report.json',
screenshotOnFail: true,
}],
],
onComplete: async function () {
const generator = new HTMLReportGenerator({
outputDir: './reports/html',
filename: 'report.html',
reportTitle: 'WebdriverIO Test Report',
});
await generator.convertJSONFolderToHTML('./reports/json');
},
};The example’s option names and constructor shape are package-specific; use the current integration instructions as the authority for your installed release. The documentation describes dashboard, filtering, export, screenshots, metadata, and optional history features.
Install and run
- Install the reporter package as a development dependency using the package manager and package instructions appropriate to your project.
- Add the reporter and its options to the existing WebdriverIO configuration. Keep the reporter’s output paths distinct from the runner’s generic
outputDir, which stores runner log files. - Run the project’s normal WebdriverIO test command. The runner writes the intermediate JSON output.
- Allow the asynchronous
onCompleteconversion to finish. Open the configured HTML output file after the run.
WebdriverIO’s configuration reference documents the reporter array format and the separate runner outputDir setting: Configuration.
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Use the command-line converter instead
The package documentation also describes a CLI conversion command. Its documented shape is:
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Aggregate output across suites
If a run produces separate suite or worker output, decide explicitly how those results become one report. The HTML Nice Reporter documentation explains that the runner invokes a reporter per suite and demonstrates creating a master report with a ReportGenerator flow in onComplete. It also recommends cleanup or setup in onPrepare.
// Illustrative flow only: use the current package documentation for exact imports/options
exports.config = {
reporters: [
['html-nice', {
outputDir: './reports/html-nice',
filename: 'report.html',
reportTitle: 'WebdriverIO Test Report',
}],
],
onPrepare: async function () {
// Perform the package-documented report cleanup/setup here.
},
onComplete: async function () {
// Use the package's ReportGenerator flow to build the master report.
},
};This is a workflow outline, not a universal drop-in configuration: use the exact imports, constructor arguments, and option names shown by the HTML Reporter documentation. For CI sharding or parallel workers, verify where each process writes intermediate files and ensure aggregation runs after all relevant output is available. The documentation does not establish that every execution topology merges automatically.
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Choose history, screenshots, or other artifacts when needed
History and trends
The JSON HTML Reporter documents optional historical execution data. Serenity/JS HTML Reporter exposes settings including maxHistory and consistencyWindow, as well as output directory, report title, project name, test-run ID, and module ID. Those settings make it an option when reports need retained run context. See JSON HTML Reporter and Serenity/JS HTML Reporter.
Screenshots, traces, and video
Use screenshots if failure context in the report matters. If your workflow uses Allure, WebdriverIO’s DevTools documentation describes attaching trace-mode artifacts when @wdio/allure-reporter is configured. The video reporter documentation covers integrations with Allure and HTML Nice Reporter. These add-ons are useful when the team needs visual or execution evidence; they are not required to produce a basic HTML report. Sources: JSON HTML Reporter, DevTools / Allure integration, and Video Reporter.
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Troubleshoot report generation
- No HTML file appears: Check whether the selected integration requires a post-run conversion step. For the JSON HTML workflow, verify that
onCompletecalls the generator or run the documented CLI against the JSON folder. - The JSON folder is empty or missing: Confirm the reporter is registered in the active WebdriverIO config and that its output path is writable. Check the reporter’s own option names; they are not interchangeable with the runner’s
outputDir. - The process exits before conversion completes: Make the completion hook asynchronous and await the documented conversion operation so the runner can finish the report generation before exiting.
- Some suites are absent from a master report: Inspect per-suite and per-worker output locations, then ensure the aggregator sees all intermediate files and runs only after those files have been written.
- Package import or option errors: Compare the installed package release with its current WebdriverIO integration page. The documentation does not provide a universal compatibility matrix for all WebdriverIO major versions.
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Further customization
For behavior beyond the integrations’ built-in options, WebdriverIO documents a custom reporter pattern that extends @wdio/reporter: Custom Reporter. The runner’s available reporters and services are listed in the Testrunner documentation.
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