流星现场直播可以播放动画吗? [英] Can Meteor live changes have animations?

问题描述

流星如何处理实时变化?例如，我不希望更改是瞬时的，而是需要某种形式的动画.如果我们使用CSS动画/过渡放置要更改的项目，这行得通吗?较旧的浏览器的jQuery动画呢?

How does Meteor handle live changes? For instance I don't want changes to be instantaneous, but with some kind of animation of sorts. If we place the items being changed using css animations/transitions does this work? What about jQuery animations for older browsers?

推荐答案

这是一个带有流星的简单动画的有效示例.

Here is a working example of a simple animation with meteor.

这里的情况是我们有一个项目列表.如果用户单击其中任何一项，则该项将向左侧移动20px.

The situation here is that we have a list of items. If the user clicks on any of those items the item will animate 20px to the left.

JS

//myItem
Template.myItem.rendered = function(){
  var instance = this;
  if(Session.get("selected_item") === this.data._id){
    Meteor.defer(function() {  
      $(instance.firstNode).addClass("selected"); //use "instance" instead of "this"
    });
  }
};

Template.myItem.events({
  "click .myItem": function(evt, template){
    Session.set("selected_item", this._id);
  }
});


//myItemList
Template.myItemList.helpers({
  items: function(){
    return Items.find();
  }
});

模板

<template name="myItem">
  <div class="myItem">{{name}}</div>
</template>

<template name="myItemList">
  {{#each items}}
    {{> myItem}}
  {{/each}}
</template>

CSS

.myItem { transition: all 200ms 0ms ease-in; }
.selected { left: -20px; }

除了使用精美的CSS之外，您还可以使用jQuery动画:

Instead of using fancy CSS you can also animate with jQuery:

Template.myItem.rendered = function(){
  if(Session.get("selected_item") === this.data._id){
    $(this.firstNode).animate({
      left: "-20px"
    }, 300);
  }
};

但是随后您需要删除CSS代码.

But then you need to remove the CSS code.

.myItem { transition: all 200ms 0ms ease-in; }
.selected { left: -20px; }

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