それを自分で試してみてください - JavaScript dom_window

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<h1>Reserved Words</h1>
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You cannot use reserved words as variables, labels, or function names:
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abstract 
arguments 
boolean 
break 
byte 
case 
catch 
char 
class 
const 
continue 
debugger 
default 
delete 
do 
double 
else 
enum 
eval 
export 
extends 
false 
final 
finally 
float 
for 
function 
goto 
if 
implements 
import 
in 
instanceof 
int 
interface 
let 
long 
native 
new 
null 
package 
private 
protected 
public 
return 
short 
static 
super 
switch 
synchronized 
this 
throw 
throws 
transient 
true 
try 
typeof 
var 
void 
volatile 
while 
with 
yield

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