Parsing the debugger keyword
-
30-06-2021 - |
質問
What are the parsing rules regarding the debugger
keyword?
On Chrome, the following works fine:
debugger
console.log('Hello!')
but
debugger console.log('Hello!')
is a SyntaxError
.
Why is replacing one form of whitespace (new line) by another form of whitespace (space) so critical? What are the parsing rules for debugger
?
解決
This is not related to the debugger
statement at all, it's down to automatic semi-colon insertion.
It's the same as trying
alert('Hi');
console.log('Hello');
and
alert('Hi') console.log('Hello');
Automatic semi-colon insertion is turning your input into;
debugger;
console.log('Hello!');
所属していません StackOverflow