useTextareaAutosize

Demo

Type, the textarea will grow:

Usage

Simple example

vue

<script setup lang="ts">
const { textarea, input } = useTextareaAutosize()
</script>

<template>
  <textarea
    ref="textarea"
    v-model="input"
    class="resize-none"
    placeholder="What's on your mind?"
  />
</template>

INFO

It's recommended to reset the scrollbar styles for the textarea element to avoid incorrect height values for large amounts of text.

css

textarea {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

textarea::-webkit-scrollbar {
  display: none;
}

With `rows` attribute

If you need support for the rows attribute on a textarea element, then you should set the styleProp option to minHeight.

vue

<script setup lang="ts">
const { textarea, input } = useTextareaAutosize({ styleProp: 'minHeight' })
</script>

<template>
  <textarea
    ref="textarea"
    v-model="input"
    class="resize-none"
    placeholder="What's on your mind?"
    rows="3"
  />
</template>

Type Declarations

typescript

export interface UseTextareaAutosizeOptions {
  /** Textarea element to autosize. */
  element?: MaybeRef<HTMLTextAreaElement | undefined>
  /** Textarea content. */
  input?: MaybeRef<string | undefined>
  /** Watch sources that should trigger a textarea resize. */
  watch?: WatchSource | Array<WatchSource>
  /** Function called when the textarea size changes. */
  onResize?: () => void
  /** Specify style target to apply the height based on textarea content. If not provided it will use textarea it self.  */
  styleTarget?: MaybeRef<HTMLElement>
  /** Specify the style property that will be used to manipulate height. Can be `height | minHeight`. Default value is `height`. */
  styleProp?: "height" | "minHeight"
}
export declare function useTextareaAutosize(
  options?: UseTextareaAutosizeOptions,
): {
  textarea: Ref<HTMLTextAreaElement>
  input: Ref<string>
  triggerResize: () => void
}
export type UseTextareaAutosizeReturn = ReturnType<typeof useTextareaAutosize>