Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

docs-bug(Table): Add example with `rowspan`

Open Beginner friendly
#33,455 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
72/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Quiet
Tech stack
angular, typescript
Domain
documentation

Research direction

Start at the affected documentation page, https://material.angular.dev/components/table/examples, and review the existing Table examples. Add an example using the provided ISOTOPE_DATA to demonstrate vertically merged cells with rowspan, matching the shown Hydrogen and Helium layout. Done means the page clearly explains and renders this use case.

Written by the indexing model from the issue text.

Description

area: material/table docs gemini-triaged P4
Documentation Feedback

There are many useful Table examples in the documentation. However, a common use case that’s missing is how to use rowspan to merge identical cells vertically.

For example, say we have the following data:

const ISOTOPE_DATA: PeriodicElement[] = [
  {position: 1, element: 'Hydrogen', isotope: 'Protium', weight: 1.0078},
  {position: 2, element: 'Hydrogen', isotope: 'Deuterium', weight: 2.0141},
  {position: 3, element: 'Hydrogen', isotope: 'Tritium',  weight: 3.016},
  {position: 4, element: 'Helium', isotope: 'Helium-3', weight: 3.016},
  {position: 5, element: 'Helium', isotope: 'Helium-4', weight: 4.0026},
];

We should be able to use it to create a table like this:

Element Isotope Weight
Hydrogen Protium 1.0078
Deuterium 2.0141
Tritium 3.016
Helium Helium-3 3.016
Helium-4 4.0026

This is related to https://github.com/angular/components/issues/11551, which is similar but for the CdkTable documentation.

Affected documentation page

https://material.angular.dev/components/table/examples

Dominant language
TypeScript
Stars
25k
Forks
6.8k
Avg merge
1d 2h
Merged PRs (30d)
80

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from angular/components

All issues in angular/components

Similar issues

More TypeScript issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.