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　　Vue不仅内置了各类指令，包括条件渲染、事件处理等，还能注册自定义指令。 一、条件渲染 　　条件渲染的指令包括v-if、v-else、v-else-if和v-show。 1）v-if 　　该指令的功能和条件语句中的if类似，可根据表达式的计算结果，判断是否渲染分支中的元素和它所包含的子元素。在下面的示例中，当把数据对象的exist属性设为true时，<div>和<p>两个元素就会被添加到页面的DOM中。 <div v-if="exist"> <p>strick</p> </div> <script> var vm = new Vue({　 data: {　　 exist: true　 } }); </script> 　　当需要通过v-if指令渲染多个元素，并且不必指定包裹元素时，就得使用Vue提供的<template>元素了，如下代码所示。其功能类似于React的Fragments，也可生成一个不可见的包裹元素，并且在最终的DOM中，不会包含<template>元素。 <template v-if="exist"> <p>strick</p> <p>freedom</p> </template> 2）v-else 　　该指令的功能和条件语句中的else类似，需要与v-if配合使用，并且要紧跟在v-if或v-else-if之后（如下所示），否则该指令将失效。 <p v-if=

Here is my code: public class CaptureENTER extends Activity implements OnKeyListener{ /* on create and other stuff in here*/ @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) { Toast.makeText(LiVoiceActivity.this, "YOU CLICKED ENTER KEY", Toast.LENGTH_LONG).show(); } return false; } I don't know what is going on, but when I press the ENTER key in my keyboard (I am using the Android emulator), the event is not activated . What am I missing? Returning true is not the issue. You're failing

This question already has an answer here: execute function on enter key 8 answers im trying to make my own chat... so i have an input text field, the submit button, isn't even submit, its just a button.... so when the enter key is pressed, i need the value of the input field to appear in my textarea (which is readonly)... well look.. make long story short, i just want a basic enter key event handler, i know it works perfectly with submit buttons cus you don't need to program anything at all, its default. but my button is type="button" .... so when you press enter nothing happens... how do i

I have a standard asp:login control: <asp:Login ID="mbLogin" runat="server" TitleText="" DestinationPageUrl="~/Default.aspx" PasswordRecoveryText="Forgot your password?" PasswordRecoveryUrl="~/LostPassword.aspx"></asp:Login> In Internet Explorer, pressing Enter does not submit the form, but IE beeps at me 10 times rapidly. In other browsers Enter works perfectly fine and submits the forum as you'd expect. I've seen this question but that only works when you have actual form element with an actual button, not the login control as a whole. Why is it being blocked in IE (and why 10 times for some

Can anyone tell me how to disable and enable the Enter key in the soft keyboard? just go to your xml and put this attribute in EditText android:singleLine="true" and your enter key will be gone Shankar Agarwal Attach OnEditorActionListener to your text field and return true from its onEditorAction method, when actionId is equal to IME_ACTION_DONE . This will prevent soft keyboard from hiding: EditText txtEdit = (EditText) findViewById(R.id.txtEdit); txtEdit.setOnEditorActionListener(new OnEditorActionListener() { public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if

I have been following the official Android tutorials and somehow am having a problem with this very simple example to execute a function after pressing "Enter" for an EditText. I understand what I'm supposed to do and seem to have everything setup properly, but Eclipse is complaining with this line: edittext.setOnKeyListener(new OnKeyListener() { It underlines setOnKeyListener with the error: The method setOnKeyListener(View.OnKeyListener) in the type View is not applicable for the arguments (new DialogInterface.OnKeyListener(){}) And also underlines OnKeyListener with the error: The type new

How to make Enter Key Press behave like Submit in JSF. It works with InputBoxes; but not with inputSecret boxes I haven't seen this issue before. The chance is little that this behaviour is browser specific. Try in different kinds of browsers to exclude the one and other (IE6/7/8, FF, Safari, Chrome, etc). The chance is bigger that this is caused by a (poor) Javascript key event listener which incorrectly suppresses the enter key (for example a JS password validator which checks the entered characters). If still in vain, just add the following onkeypress to the h:form : <h:form onkeypress="if