I do use the JS api's and it was affecting my website. I was seeing a high number of JS errors and even worse, my users were seeing odd behavior because I was depending on your /track callbacks to fire and they weren't.
This is the second time you guys have had a major outage in recent memory and your status page looks like a christmas tree. I really do love mixpanel, but unfortunately I'm going to relegate your service in my mind to 'untrustworthy third party service' every time I write code against your api.
Also the fact that I found a pretty major bug in your loader code which prevents it from working correctly with IE browsers (https://mixpanel.com/docs/integration-libraries/javascript) last week and today you are still distributing the broken code has me worried. Do you not take this stuff seriously?
Pretty print their loader JS that is quoted in the url above. I like using the Developer Tools in chrome to do it for me: Load up that JS, go to the Sources tab and click on the {} near the bottom of the screen to auto format it for you.
The issue is that you can't insert b (the <script> tag) into the DOM until you've declared window.mixpanel because the code within mixpanel.2.js depends on window.mixpanel to be defined.
It is a subtle race condition that only seems to happen with IE, but when it would fail, it would cause one of those ugly IE dialogs to popup to the end user. Not good.
The correct code should look like this near the end... just move the insertBefore to be after the window.mixpanel:
This is the second time you guys have had a major outage in recent memory and your status page looks like a christmas tree. I really do love mixpanel, but unfortunately I'm going to relegate your service in my mind to 'untrustworthy third party service' every time I write code against your api.
Also the fact that I found a pretty major bug in your loader code which prevents it from working correctly with IE browsers (https://mixpanel.com/docs/integration-libraries/javascript) last week and today you are still distributing the broken code has me worried. Do you not take this stuff seriously?