material-components / material-components/material-web
Add auto expand to <mwc-textfield> and <mwc-textarea>
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Description
### I'm submitting a
- [ ] bug report
- [x] feature request
### Proposed Properties/Attributes
| Name | Type | Description
| ------------------- | ---------------- |------------
| `autoExpand` | `boolean` | Overflow text causes the input container to automatically expand by adding visible rows.
| `maxRows` | `number` | **Note: requires `autoExpand` to be set.** Maximum number of visible text lines.
### Example
```html
```
### Expected behaviour
### Other information
This behaviour is described under [multi-line fields](https://material.io/components/text-fields/#input-types) within the Material Design guidelines.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the implementations and tests for and , then compare their multiline behavior with the linked Material Design guidance. Done means both components support autoExpand and maxRows as described, including the example behavior shown in the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- html
- Domain
- frontend, web-dev
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100