1, Chrome official recommended to use the following keyboard shortcuts, you can not use the page cache is refreshed
Windows and Linux operating systems: Shift + F5 or Ctrl + Shift + R
Comparisons between different types of comparison == "into values of the same type of" look "value" are equal, === If the types are different, the result is unequal
Object console.log copy printing
when printing our content using console.log (), often you need to copy and paste the contents of the print use, but the console print out the objects are processed and formatted directly will select Paste format issue, then we can copy the print result console copy () method, as shown:
When executing the re-copy the content has been placed in the system clipboard, ctrl + v paste like.
Unfamiliar closure concept
https://www.cnblogs.com/cxying93/p/6103375.html