node.js - "Sandbox" for using multiple instances of a javascript lib -

node.js - "Sandbox" for using multiple instances of a javascript lib -

i'm using js lib, create global variable "av" used everywhere in webapp. want create "sandbox"(not strict sandbox because of no secure concern) utilize multiple different "av"s in 1 webapp.

i wrote wrap browser below , works.

var avcontexts = { app1: null, app2: null } var contextloader = function (appid, appkey) { this.av = null; this.runinthis = function (script) { eval(this.script); this.av.initialize(appid, appkey); } this.loadcontext = function (appid, appkey) { $.ajax({ url: 'js/av.js', datatype: "text", context: }).done(function (data) { this.script = data; this.runinthis.call(this); }).fail(function () { console.log('failed'); }); } this.loadcontext(appid, appkey); } avcontexts.app1 = new contextloader( "[appid]", "[appkey]" ); avcontexts.app2 = new contextloader( "[appid]", "[appkey]" ); // var testobject = avcontexts.app1.av.object.extend("testobject"); var testobject = new testobject(); testobject.save({foo: "bar"}, { success: function (object) { alert("avos cloud works!"); } });

but when move nodejs. error occurred @

this.runinthis.call(this); error: cannot phone call method 'call' of undefined

any idea?

you should cache "this", this:

var me = this;

before utilize $.ajax. , then,

$.ajax().done(function() { me.runinthis.call(); });

if want know reason,

run

console.log(this);

before

this.runinthis.call(this);

you know reason.

javascript node.js