1, numerical expansion
1, from after ES6, using the prefix 0b represents a binary number, use 0o representatives octal, decimal conversion with Number () function, in a non-strict mode, 0o011 === 011 returns true, in strict mode error.
2, the new Number method:
3, the new method Math:
4, left and right shift operator << operator >>
<< left shift operator: In case of a digital does not overflow, the left n bits corresponding to n-th power of 2 multiplied by (of course, first be converted to binary)
Right-shift operator >>: left and opposite, high vacancy complement sign bit is 0 complement, a complement negative
Unsigned right shift operator >>>: regardless of whether positive or negative
The exponential operator (**): e.g. 5 2 ** corresponds to 5 th power of 2
2, string expansion
1, Unicode notation: curly braces represents the Unicode character (\ u {0xXX} or \ u {0XXX})
2, the string traversal: for-of traversal through the string
3, String template: a single line can be multiple rows can be inserted into an enhanced version of the string variable is ``
4, label templates: Special call function parameters (that is, $ {variable})
5, the new method:
3, object extension
1, concise writing object properties
Property name shorthand
Shorthand method name:
2, property name expression
. 3, name attribute method
4, can be traversed and properties enumerated
5, Super Keywords : prototype object points to the current object (can only be used as a shorthand method object method() {})
6, the new method
