1. In a word, basic ability is poor, theory is enough but practice is not enough.
  2. According to the project experience to ask, in fact, almost in the middle, but their foundation is not enough, can not answer.
  3. Problems are:
  • How to write a script tag and reference it properly.
  • XSS cookies.
  • HTTP is stateless.
  • The Set – cookies.
  • Same-origin policy.
  • Cross-domain processing.
  • Horizontal and vertical center.
  • CSS inheritance and cascading.
  • Determine if a variable is of base type.

4. Build your own system and familiarize yourself with the process.