Some characters in javascript are treated as blank char, including space(0x20), table(0x09), enter(0x0D,0x0A).
Blank char is used to make the code for reading and understanding. If insert a blank char into a token(keyword, variable, number), then the token is seperated to 2 parts, not one token, sometimes it causes an error.
Semicolon is used to end one sentence, like:
a = 1;
b = 2;
In javascript, the line-ending semicolon is not necessary. Above code can be written as:
a=1
b=2
But if the line is
a = 1; b = 2;
The first semicolon can not be removed.
It is recommended to add semicolon to every sentences ending, and do not cut the break and return sentence to two lines.
For example:
return true;
If you cut it to 2 lines:
return
true;
it only return, but not return a true value.
