如何从Javasript中的Closure Scope访问变量 [英] How to access variable from Closure Scope in Javasript

问题描述

如何在JavaScript中访问内部函数中的闭包范围变量。

How to access the closure scope variables in inner function in JavaScript.

我要在 setTimeout 函数。

I want to access UL variable in setTimeout function.

    ul.find("li").each(function (a, ele) {

        $(ele).attr("tabindex", options.items[a].tabindex);

        $(ele).on("focusout", function () {

            setTimeout(function () {
                **//ACCESS UL HERE**
                debugger;
            }, 1);

        }.bind(ul,ele));
    }.bind(ul));

推荐答案

使用 关闭 $ c> setTimeout

它们的创建环境。

Closures 'remember' the environment in which they were created.

ul.find("li").each(function(a, ele) {
  $(ele).attr("tabindex", options.items[a].tabindex);
  $(ele).on("focusout", function() {
      setTimeout(function(ul) {
        return function() {
          console.log(ul);
        }
      })(ul), 1);
  }.bind(ul, ele));
}.bind(ul));

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