Change size of textarea

Question

I currently have a textarea like this:

<textarea matInput rows="5" cols="40" placeholder="text"></textarea> 

However, it is always the same size.

Any idea on how to change the size of the textarea?

Answer 1

Depending on what you've meant by:

However, it is always the same size.

There are two options.

OPTION 1 (STATIC size depending on rows \ cols):

Currently, only rows affects the Material textarea height, cols doesn't change its width.

Therefore for increasing width, we have to use the CSS width property on a mat-form-field containing our textarea:

<mat-form-field style="width: 300px;">     <textarea matInput rows="5" cols="40" placeholder="text"></textarea> </mat-form-field> 

OPTION 2 (DYNAMIC size to fit textarea content):

In Material 6, CdkTextareaAutosize directive was added.

From an official docs:

The cdkTextareaAutosize directive can be applied to any <textarea> to make it automatically resize to fit its content. The minimum and maximum number of rows to expand to can be set via the cdkAutosizeMinRows and cdkAutosizeMaxRows properties respectively.

And here's a simplified example from there:

<mat-form-field>     <mat-label>Autosize textarea</mat-label>     <textarea         matInput         cdkTextareaAutosize         cdkAutosizeMinRows="1"         cdkAutosizeMaxRows="5">     </textarea> </mat-form-field> 

NOTE:
matTextareaAutosize mentioned in other answers is deprecated and will be removed in the next major release. The official docs already use cdkTextareaAutosize instead.

Answer 2

Here's an example :

<mat-form-field>   <mat-label>Description</mat-label>   <textarea matInput formControlName="description" matTextareaAutosize matAutosizeMinRows=1 matAutosizeMaxRows=5></textarea> </mat-form-field> 

Reference: https://material.angular.io/components/input/api