This is a very long blog
Finally the authoritative guide to buy back, has been hesitant, first: The book is too thick, afraid to buy can not insist on reading. Second: Feel too expensive, at least 100 ¥. Now the internship can also pay a little salary, set a volunteer for themselves: the one-month salary for the purchase of books. It's not too much of an expense to buy a 100¥ book. Good! Buy! In order to insist on reading, I will send reading notes to the blog, to urge themselves, but also to deepen their impressions, one at a stroke N, so decided.
Start reading:
1.
JS "False value": false, Undefined,null,0,-0,nan, "" (empty string) Total 7 All the remaining values are all true.
When JS expects to use a Boolean value, it treats the Undefined,null,0,-0,nan, "" as false.
2.
When the browser initializes, the initial properties of the global object are:
Global properties: Undefined, Infinity,nan
Global functions: IsNaN (), parseint (), eval ()
Constructor: Date (), RegExp (), String (), Object (), Array ()
Global objects: Math, JSON
3.
= = will turn Undefined,null,0,-0,nan, "" and convert to False
= = Treats the string, number, and Boolean primitive values as equal to their wrapper classes (objects). = = = as unequal
The JavaScript authoritative guide reading notes