Priority of JS operator

js Operator precedence

Because recently js One of the typeof My scalp is numb because of my priority , So make a complete record js Operator priority

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priority	Arithmetic type	Relevance	Operator
21	parentheses	n/a（ Unrelated ）	（）
20	Member visit	From left to right ）	.
20	Member access to be calculated	From left to right ）	[]
20	new ( With parameter list )	n/a	new … ( … )
20	Function call	From left to right ）	… ( … )
20	Optional chain （Optional chaining）	From left to right ）	?.
19	new ( No parameter list )	From right to left	new …
18	Post increment ( Operator after )	n/a	… ++
18	Post decrement ( Operator after )	n/a	… –
17	Logic is not	From right to left	! …
17	Bitwise non	From right to left	~ …
17	Unary addition	From right to left	+ …
17	One dollar subtraction	From right to left	- …
17	Pre increment	From right to left	++ …
17	Pre decrement	From right to left	–…
17	typeof	From right to left	typeof
17	void	From right to left	void
17	delete	From right to left	delete
17	await	From right to left	await
16	power	From right to left	… ** …
15	Multiplication	From left to right	… *…
15	division	From left to right	… /…
15	modulus	From left to right	… %…
14	Add	From left to right	… +…
14	Subtraction	From left to right	… -…
13	Move left according to position	From left to right	… << …
13	Right shift to position	From left to right	… >>…
13	unsigned right shift	From left to right	… >>> …
12	Less than	From left to right	… < …
12	Less than or equal to	From left to right	… <= …
12	Greater than	From left to right	… <>…
12	Greater than or equal to	From left to right	… >= …
12	in	From left to right	… in …
12	instanceof	From left to right	… instanceof …
11	Equal sign	From left to right	… ==…
11	Unequal sign	From left to right	… !=…
11	All in one	From left to right	… ===…
11	Not all equals	From left to right	… !==…
10	Bitwise AND	From left to right	… &…
9	Bitwise XOR	From left to right	… ^…
8	Press bit or	From left to right	… 1…
7	Logic and	From left to right	… &&…
6	Logic or	From left to right	11
5	Null merge	From left to right	… ?? …
4	Conditional operator	From right to left	… ? … :
3	assignment	From right to left	… =、+= Equisign …
2	yield	From right to left	yield …
2	yield*	From right to left	yield* …
1	Expand operator	n/a	…
0	comma	From right to left	,

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