Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "how to use WeChat Mini Programs's multi-line input box textarea". In the operation of the actual case, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Textarea

Multiline input box.

The default value of the attribute name type indicates the content of the valueString input box when the placeholderString input box is empty. Placeholder-styleString specifies the style of placeholder. Placeholder-classStringtextarea-placeholder specifies whether the style class disabledBooleanfalse of placeholder disables the maximum input length of maxlengthNumber140. If it is set to-1, the maximum length of auto-focusBooleanfalse is not limited and the keyboard is pulled up. FocusBooleanfalse gets whether the focus auto-heightBooleanfalse increases automatically. When setting auto-height, style.height does not take effect fixedBooleanfalse if the textarea is in an area of position:fixed, you need to display the specified attribute fixed specifies the distance between the cursor and the keyboard (in px) for truecursor-spacingNumber0. Take the minimum distance from the bottom of textarea and the distance specified by cursor-spacing as the distance between the cursor and the keyboard. The bindfocusEventHandle input box is triggered when the bindfocusEventHandle input box is focused, event.detail = {value: value} bindblurEventHandle input box is triggered when it loses focus, event.detail = {value: value} bindlinechangeEventHandle input box is called when the number of rows changes, event.detail = {height: 0, heightRpx: 0, lineCount: 0} bindinputEventHandle when keyboard input, input event is triggered, event.detail = {value: value} The return value of the bindinput handler is not reflected in the confirm event triggered by the bindconfirmEventHandle click completion on the textarea, event.detail = {value: value}

Sample code:

Make the input box get focus submission / / textarea.jsPage ({data: {height: 20, focus: false}, bindButtonTap: function () {this.setData ({focus: true})}, bindTextAreaBlur: function (e) {console.log (e.detail.value)}, bindFormSubmit: function (e) {console.log (e.detail.value.textarea)}}) Bug & Tip

Bug: Wechat version 6.3.30 the position of the newly added textarea in autofocus was miscalculated when the list was rendered.

The blur event of tip:textarea is later than the tap event on the page. If you need to get the textarea in the click event of button, you can use form's bindsubmit.

Tip: it is not recommended to modify the user's input on multiline text, so the bindinput handler of textarea does not reflect the return value to textarea.

The tip:textarea component is a native component created by the client, and its level is the highest.

Tip: do not use textarea components in scroll-view.

Tip:css animation is not valid for textarea components.

This is the end of the introduction of "how to use WeChat Mini Programs's multi-line input box textarea". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.