Meteor Deps - 运行客户端功能 [英] Meteor Deps - Running a Client Side Func

问题描述

我正在努力掌握 Meteor deps，为了具体说明我的用例是:

I'm struggling to get a handle on Meteor deps, in order to be specific my use case is:

2) 当集合改变时，我想在客户端运行一个 jQuery 函数

2) When collection is changed, I want to run a jQuery function on the client side

我认为 deps 是我要找的东西，但目前我才刚刚使用:

I think deps are what I'm looking for, but at the moment I have only just used:

Template.templateName.set () ->
 return Set.find({})

...在反应性方面.

一个在每次更改时简单地将 console.log 记录在集合中的解决方案就足够了.

A solution which simply console.log's the collection each time it is changed would be more that enough.

推荐答案

使用上下文当然可以做你想做的事.它比[1]要复杂一点，但是如果您按照文档中的 deps 示例进行操作，则可以很容易地完成您想要的操作.类似的东西

It's certainly possible to do what you want using contexts. It's a little more complicated than it could be[1], but you can do what you want pretty easy if you follow the deps example from the docs. Something like

var setup = function() {
  var context = new Meteor.deps.Context();
  context.on_invalidate(function() {
    setup();
  });
  context.run(function() {
    Set.find({});
    console.log('changed');        
  });
}
setup();

或者您可以制作一个不返回任何内容的帮助程序，以利用将为您设置的上下文:

Or you could make a helper that returns nothing to take advantage of the context that'll get setup for you:

Template.templateName.do_nothing -> 
  console.log 'changed'
  Set.find({})
  null

虽然这会强制 HTML 在您不希望刷新时刷新.

Although that will force the HTML to refresh when you might not want it to.

另一方面，您可能只需要 Collection.observe.

On the other hand, you might just want Collection.observe.

[1] 如果/当他们合并此拉取请求时，您可以这样做类似:

[1] If/when they merge this pull request, you could just do something like:

Meteor.deps.await(function() { return Set.find(); }, function() { 
  console.log('changed'); 
});

如果您想了解更多信息，可以查看 await 函数的源代码.

You can take a look at the source of the await function if you want some more insight.

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