javascript - jQuery 插件 : how to pass element reference to callback function?

Question

TL;DR:我有 jQuery.myPlugin

$.fn.myPlugin = function(param, callback){
  //...which does some operations to each member of collection
  //obtained by $('.someclass').myPlugin()
  //that are represented with this variable
}

当插件的工作完成时，如何将 this 变量 - 单节点引用 - 传递给 callback？像这样:

$.fn.myPlugin = function(param, callback){
  //...
  //...
  //when job is done:
  callback.call(this);
}
$('.someclass').myPlugin(options, function(arg){ 
  //I need arg to be this variable from plugins definition...
})

只是提一下，无论我传递给 callback.call(somevar)，somevar 在执行的匿名回调函数中都不可用。

Answer 1

如果回调确实是一个函数，你应该试试

callback(this);