TextArea

Multiline input box. This component is Native component, please note the limitations.

Example

Page({
  data: {
    textareaValue: 'controlled',
    inputValue3: '',
    lineCount: 0,
    inputValue4: '1234567890',
    inputValue5: "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.",
    confirmType: 5,
    confirmTypes: [ 'send', 'search', 'next', 'go', 'done', 'return']
  },
  onLoad(query) {
    console.log('onload', this, query)
  },
  onShow() {
    console.log(`[LifeCycle][Textarea] useEffect`)
  },
  onReady() {
    console.log(`[LifeCycle][Textarea] useReady`)
  },
  onHide() {
    console.log(`[LifeCycle][Textarea] useDidHide`)
  },
  onTextareaValueInput(e) {
    this.setData({
      textareaValue: e.detail.value
    })
    console.log(`[onTextareaValueInput] textarea`, e)
  },
  onInputValue3Click(e) {
    this.setData({
      inputValue3: e.detail.value
    })
    console.log("[Textarea] Click", e)
  },
  onInputValue4Input(e) {
    this.setData({
      inputValue4: e.detail.value
    })
    console.log(`[onInputValue4Input] textarea`, e)
  },
  onInputValue4Focus(e) {
    console.log("[Textarea] bindfocus", e)
  },
  onInputValue4Blur(e) {
    console.log("[Textarea] bindblur", e)
  },
  onInputValue4Click(e) {
    console.log("[Textarea] Click", e)
  },
  onInputValue4Longpress(e) {
    console.log("[Textarea] longpress", e)
  },
  onInputValue4Confirm(e) {
    console.log("[Textarea] bindconfirm", e)
  },
  onInputValue4KeyboardHeightChange(e) {
    console.log("[Textarea] bindkeyboardheightchange", e)
  },
  onInputValue4LineChange(e) {
    console.log("[Textarea] bindlinechange", e)
  },
  onLineCountLineChange(e) {
    console.log("[Textarea] bindlinechange", e)
    this.setData({
      lineCount: e.detail.lineCount
    })
  },
  onInputValue5Input(e) {
    this.setData({
      inputValue5: e.detail.value
    })
    console.log(`[onInputValue5Input] textarea`, e)
  },
  onConfirmTypeChange(e) {
    this.setData({
      confirmType: e.detail.value === "string" ? parseInt(e.detail.value) : e.detail.value
    })
  },
})

Bug & Tip

• tip: textarea of blur The event will be later than the tap Event, if needed in the button Click event acquisition textarea, can be used form of bindsubmit。
• tip: Modifying user input over multiple lines of text is not recommended, so textarea of bindinput Handler does not reflect the return value to the textarea Up.
• tip : If the keyboard height changes, the keyboardheightchange event may be triggered multiple times. Developers should ignore the same height value

Props

Name	Type	Description	Default
value	string	Enter the contents of the box
placeholder	string	Placeholder when input box is empty
disabled	boolean	Is it disabled?	false
maxlength	number	Maximum input length, set to -1 Does not limit the maximum length	140
auto-focus	boolean	Autofocus, pull up the keyboard.	false
focus	boolean	Getting focus	false
placeholder-class	string	Custom class name for placeholder jssdk > 4.33.0
force	boolean	whether to force update the value of the textarea, default is false	false
selection-start	number		-1
selection-end	number		-1
cursor	number		-1
auto-height	boolean	whether to update the height of the textarea automaticly text overflow, default is false	false

Events

Name	Description
bindinput	When keyboard input, triggers input Event, event.detail = {value, cursor, keyCode}, keyCode Is a key value and currently the tool does not support returning keyCode parameters. bindinput The return value of the handler is not reflected in the textarea on
bindinputcapture	Trigger when textarea input event capture phase, see more about DOM3-EVENTS
bindfocus	bindfocus Triggered when input box is focused, Arguments detail: value: string, height: number — height For keyboard height
bindfocuscapture	Trigger when textarea focus event capture phase, see more about DOM3-EVENTS
bindblur	Triggered when the input box loses focus, event. detail = {value, cursor}
bindblurcapture	Trigger when textarea focus event capture phase, see more about DOM3-EVENTS
bindlinechange	Called when the number of lines in the input box changes, Arguments event: detail: Object — detail = {height: 0, heightRpx: 0, lineCount: 0}