This post provides some resources that will help you become a JavaScript expert.
Do you know when
and when not - to use the JavaScript var statement?
it’s safe to use non-strict comparison operators?
to cache your JavaScript objects?
to use feature detection?
you should use inline event handlers?
If you had difficulty with ANY of the questions you will benefit from the following JavaScript resources:
JavaScript is formalized in the ECMAScript language standard.
Reading the standard is a good way to become a JavaScript expert.
Click here to download a PDF containing the ECMAScript languge standards:
Standard ECMA-262
Mozilla offers an excellent JavaScript Guide for newbies and a complete JavaScript Reference for all:
JavaScript MDN
JavaScript Reference - JavaScript MDN
W3Schools provides an online tutorial:
JavaScript Tutorial
The W3 has developed many of Web APIs available to JavaScript developers:
JavaScript Web APIs - W3C