Event description

We print out all the properties and methods of the event after the keyboard is pressed (here, press 1 as an example)

			document.onkeydown = function(event){
				console.log(event);
			}

There are a few properties to note here

key: the name of the pressed key

keyCode : The key code of the key pressed

altKey, ctrlKey, shiftKey: When the combination is pressed (such as ctrl+c), ctrlKey will become true

1. View all keys

(Get the name of the key pressed by event.key) (Get the key code pressed by event.keyCode)

			document.onkeydown = function(event){
				console.log("按下:"+event.key+"键:"+event.keyCode);
			}

The effect after pressing any key:

Here we take the Enter key (the key code is 13) as an example. If you need to monitor different keys, you can modify the key code.

			document.onkeydown = function(event){
				if(event.keyCode==13){
					// 事件
					console.log("按下了回车键")
				}
			}

Here is an example of CTRL+A

altKey: true when the Alt+* key combination is pressed

ctrlKey: true when the Ctrl+* key combination is pressed

shiftKey: true when the Shift+* key combination is pressed

			document.onkeydown = function(event){
				if(event.ctrlKey & event.keyCode == 65){
					console.log("按下了CTRL+A")
				}
			}

Key code values for alpha and numeric keys
button	key code	button	key code
A	65	J	74
B	66	K	75
C	67	L	76
D	68	M	77
E	69	N	78
F	70	O	79
G	71	P	80
H	72	Q	81
I	73	R	82

Key code values for alpha and numeric keys
button	key code	button	key code
S	83	1	49
T	84	2	50
U	85	3	51
V	86	4	52
W	87	5	53
X	88	6	54
Y	89	7	55
Z	90	8	56
0	48	9	57

Key code value for a key on the numeric keypad
button	key code	button	key code
0	96	8	104
1	97	9	105
2	98	*	106
3	99	+	107
4	100	Enter	108
5	101	-	109
6	102	.	110
7	103	/	111