var a = 'You can start here \ and continue here \ and then finish it up here.';
The backslash on each line allows you to keep going. It's a little bit cleaner than opening and closing quotes and a concatenation operator on each line.
And now's your chance to say, "I can't believe you didn't know that."
â€” I can't believe you didn't know that.
I can't believe you didn't know that. :P
Huh. I knew you could add or remove whatever whitespace you want, but I did not know that strings could be broken across lines using the backslash. Cool tip!
I didn't know that either, so you're note the only one :) By the way, I think your quotes are mismatched.
I can't believe you didn't know that.
Sorry, I didn't know it either, I just wanted to be the idiot to say it.
Have a good day!
I think you've been mistaken. The quote you're looking for is..." i can't believe i didn't know that either...."
... yeah. (not to be confused with "array.forEach"
@Mark Story: Ooh, fixed mismatched quotes. Thanks!
I can't believe you didn't know that!!!
Well, the thing I most love about it is that you'll say it. Sometimes I don't blog things because I figure, "Oh heck, someone probably said that already 2 years ago... somewhere... probably." So good on ya because I sure didn't read it! :)
That's like heredoc. I can't believe you didn't know that.
JS on multiple lines... CSS on single lines... what the hell is the world coming to?!?
And what is this blog I keep hearing about on the fax?
I can't believe you didn't know that.
Actually I do not know that too. Thanks for the tips. :)
neat trick, but JSLint doesn't like it. :)
I can't belive you didn't know that.
I can't believe *I* didn't know that!
Ah, I knew that once, but I'd totally forgotten it. Thanks for the reminder!
Awesome tip Jonathon - I've always wondered if there was an easier way than the rather clumsy "close string, concatenate on each line". I probably should have looked it up... duh.
mmm, Interesting... I wonder if this would work with JSminifier scripts?
â€” I can't believe I didn't know that.
^ same! i had no idea u could do that! nice little tip and i think it will actually fix a problem i was having! :)
I did not know this, why hasn't anyone told me about this before?
shucks, I can't believe I didn't know that either
Interesting. I don't think it is cleaner than concatenating several quoted strings though. Imaging you need to define such a long string inside some function - how do you indent it? Either your code looks ugly, or you have some extra spaces or tabs in your string.
I can't \
believe you didn't know \
Whether you knew it or not, there's always beginners like myself that don't know this stuff. Thanks for posting!
@Dominic: agreed, indentation could be a concern. I have that issue with the HEREDOC approach in PHP.
Yeah, I can't believe *I* didn't know that!
I can't believe you didn't show this to us before.
The worse part of me not knowing about that, is that I've specifically searched for ways to do it. Oy.
I can't believe it's not butter... oh wait... o_O
Yes, I can believe you didn't know that: it was illegal in ECMA-262 3rd Edition:
But there is "good news", in the final draft of ECMAScript 5th (TC39/2009/025) that sintax becomes accepted:
I can't believe I didn't know that either. Damn all those '+'!
Anyway, I think it is good that we didn't know that. We shouldn't be writing too much text inside a script.
Different browsers support that slightly differently. As someone mentioned, I believe line indentation is different, and some browsers keep the newline within the string whereas others will remove it.
Unless you're using a specific browser (i.e.: Webkit in Adobe AIR or Titanium), then it might be more beneficial to simply use standard concatenation.
(I found out about this the other week so did a little further research. No specifics were given in my findings though, so perhaps they're outdated. I prefer to lean on the side of caution.)
I can't belive you didn't know that, yes.
YUI Compressor doesn't have any problems with it. It strips the return and the backslash.
Crockford's JSMin leaves the backslashes and returns as is.
Having written lots and lots of JS code, I didn't know it either. Thanks for the great tip :-)
This random blog post was probably mine when I emailed you about it ;)
That one more specifically : http://www.caktux.ca/blog/suy-jquery-ui-based-ie6-outdated-notification-plugin
I suppose you didn't need a "Your browser is outdated" jQuery notification for your too-hard-for-IE6 projects :)
Believe it or not, I *did* know that, I just always found it to strange looking to use. Maybe you'll put it to more use than I have.
I can't believe that you didn't know that! But more importantly, I can't believe that I didn't know that!
@caktux: Actually, yes, I do believe that's what originally tipped me off. I remember thinking, "is this just for code presentation or does this actually work?" And it does. :)
I can't believe you didn't know that AND that you wrote a blog post about it. Amazing....
This brings back slightly disturbing memories of multi-line commands in classic asp :)
I actually ran into a problem with this yesterday and ended up using a slightly more convoluted solution, so thanks for pointing this out!
that was really simple :)
Thanks for this, now some of the plugins I have been using make a lot more sense!