如何在jQuery $ .bind（）中使用Coffeescript'this'？ [英] How can I use Coffeescript 'this' from within jQuery $.bind()?

问题描述

在Coffeescript中使用课程时，我偶然发现了一个重大问题，让我举例说明

When using classes in Coffeescript, I've stumbled upon a major problem, let me illustrate

class Bet
  constructor: () ->

  placeBet: ->
    $('#chips > div').bind 'click', ->
      amount = $(this).attr 'id'
      pile = $(this)
      switch amount
        when "ten" then this.bet pile, amount #This line causes a problem

  bet: (pile, amount) ->
    alert 'betting!'

拨打 this.bet 上面生成以下错误：

The call to this.bet above generates the following error:

未捕获TypeError：Object＃没有方法bet

所以，目前我的类的实例方法没有被调用
如何正确调用我的类的投注方法，没有它碰撞的jQuery选择器的这

So, currently the instance method of my class is not being called, How can I correctly call the bet method of my class without it colliding with the jQuery selector's this (Which is what I suppose is happening now)?

推荐答案

试试这个：

class Bet
  constructor: () ->

  placeBet: ->
    that = this
    $('#chips > div').bind 'click', ->
      amount = $(this).attr 'id'
      pile = $(this)
      switch amount
        when "ten" then that.bet pile, amount #This line causes a problem

  bet: (pile, amount) ->
    alert 'betting!'

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