流星页面刷新与按钮单击

Meteor Page Refreshing with Button Click

本文关键字：按钮 单击 刷新 流星      更新时间：2023-09-26

我在这里遵循一些代码：http://code.tutsplus.com/tutorials/real-time-messaging-for-meteor-with-meteor-streams--net-33409

构建聊天应用。我想添加另一个文本输入框，该输入框也将项目发送到聊天框，但是每当我按下另一个按钮时，都会创建。换句话说，一个聊天框有两个输入框。

当我按下一个按钮时

它可以工作，当我按下另一个按钮时，它会刷新页面并删除聊天框中之前的所有内容。任何帮助都会非常好。

<!-- Chat Box with chat messages and the input box -->
<template name='chatBox'>
  <div id='messages'>
    {{#each messages}}
      {{>chatMessage}}
    {{/each}}
  </div>
  <textarea id='chat-message'></textarea><br>
  <button class='btn btn-primary' id='send'>Send Chat</button>
</template>
<!-- Template for the individual chat message -->
<template name='chatMessage'>
  <div>
    <b>{{user}}:</b> {{message}}
  </div>
</template>
<template name="solBox">
  <h3>Your problem is:</h3>
  <strong>Write a structure definition in racket for a <em>vector</em> with fields <em>x</em> and <em>y</em>.</strong>
  <br>
  <br>
  <form class="solution">
    Solution: 
      <textarea id='solText'></textarea>
      <button class='btn btn-primary' id='solve'>Send Solution</button>
  </form>
</template>
//assign collection to the messages helper in chatBox template
Template.chatBox.helpers({
  "messages": function(){
    return chatCollection.find();
  }
});
//generate a value for the 'user' helper in chatMEssage template
Template.chatMessage.helpers({
  "user": function(){
    if(this.userId == 'me'){
      return this.userId;
    } else if (this.userId){
      getUsername(this.userId);
      return Session.get('user-' + this.userId);
    } else {
      return 'anonymous-' + this.subscriptionId;
    }
  }
});
//When send chat is clicked add the typed chat message into the collection
Template.chatBox.events({
  "click #send": function(){
    var message = $('#chat-message').val();
    console.log(message);
    chatCollection.insert({
      userId: 'me',
      message: message
    });
    $('#chat-message').val('');
    //add the message to the stream
    chatStream.emit('chat', message);
  }
});
//Solutionbox stuff
Template.solBox.helpers({
  "messages": function(){
    return chatCollection.find();
  }
});
Template.solBox.events({
  "click #solve": function() {
    var solution = $('#solText').val();
    console.log(solution);
    chatCollection.insert({
      userId: 'me',
      message: solution
    });
    $('#solText').val('');
    solStream.emit('sol', solution);
  }
});
chatStream.on('chat', function(message){
  console.log(message + "on");
  chatCollection.insert({
    userId: this.userId, //get the userId of the sender
    subscriptionId: this.subscriptionId, //subscription id of the sender
    message: message
  });
});
solStream.on('sol', function(solution){
  console.log(solution + "on");
  chatCollection.insert({
    userId: this.userId, //get the userId of the sender
    subscriptionId: this.subscriptionId, //subscription id of the sender
    message: solution
  });
});

我把它上传到网站：http://grcooper-wesolve-test.meteor.com/

当您单击表单内的按钮时，默认的浏览器行为是提交表单，这会导致另一个 HTTP 请求并重新加载页面。为了避免这种情况，事件处理程序需要显式阻止默认行为：

Template.solBox.events({
  'click #solve': function(e) {
    e.preventDefault();
    // the rest of your code goes here
  }
});
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