JavaScript string newline character

Question

Is  n the universal newline character sequence in Javascript for all platforms  If not  how do I determine the character for the current environment   I m not asking about the HTML newline element   lt BR  gt    I m asking about the newline character sequence used within JavaScript strings

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I had the problem of expressing newline with  n or  r n  Magically the character  r which is used for carriage return worked for me like a newline  So in some cases  it is useful to consider  r too

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Yes  it is universal   Although   n  is the universal newline characters  you have to keep in mind that  depending on your input  new line characters might be preceded by carriage return characters    r

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Email link function i use   0D 0A   function sendMail        var bodydata  Before      0D 0A       bodydata   After   var MailMSG    mailto aaa sss com                cc 07 sss com                amp subject subject                amp body     bodydata   window location href   MailMSG         HTML    lt a href     onClick  sendMail    gt Contact Us lt  a gt

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Don t use   n   Just try this   var string    this  is a multi  line  string     Just enter a back-slash and keep on truckin   Works like a charm

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It might be easiest to just handle all cases of the new line character instead of checking which case then applying it   For example  if you need to replace the newline then do the following   htmlstring   stringContainingNewLines replace    r n  n  r  gm    lt br gt

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I believe it is -- when you are working with JS strings   If you are generating HTML  though  you will have to use  lt br   gt  tags  not  n  as you re not dealing with JS anymore

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printAccountSummary  function            return  Welcome       n     Your balance is currently  1000 and your interest rate is 1        console log savingsAccount printAccountSummary        method   Prints   Welcome  Your balance is currently  1000 and your interest rate is 1

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you can use  lt br  gt  and the document write   document writeln one

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The  n is just fine for all cases I ve encountered  I you are working with web  use  n and don t worry about it  unless you have had any newline-related issues

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I ve just tested a few browsers using this silly bit of JavaScript    x000D   x000D  function log newline msg  test value    x000D    if   test value     x000D      test value   document getElementById  test   value  x000D      x000D    console log msg           test value match   r      CR        x000D                         test value match   n      LF          x000D    x000D   x000D  log newline  HTML source    x000D  log newline  JS string    foo nbar    x000D  log newline  JS template literal    bar x000D  baz    x000D   lt textarea id  test  name  test  gt  x000D   x000D   lt  textarea gt  x000D   x000D   x000D    IE8 and Opera 9 on Windows use  r n  All the other browsers I tested  Safari 4 and Firefox 3 5 on Windows  and Firefox 3 0 on Linux  use  n  They can all handle  n just fine when setting the value  though IE and Opera will convert that back to  r n again internally  There s a SitePoint article with some more details called Line endings in Javascript   Note also that this is independent of the actual line endings in the HTML file itself  both  n and  r n give the same results    When submitting a form  all browsers canonicalize newlines to  0D 0A in URL encoding  To see that  load e g  data text html  lt form gt  lt textarea name  foo  gt foo 0abar lt  textarea gt  lt input type  submit  gt  lt  form gt  and press the submit button   Some browsers block the load of the submitted page  but you can see the URL-encoded form values in the console     I don t think you really need to do much of any determining  though  If you just want to split the text on newlines  you could do something like this   lines   foo value split   r n  r  n g

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A note - when using ExtendScript JavaScript  the Adobe Scripting language used in applications like Photoshop CS3    the character to use is   r     n  will be interpreted as a font character  and many fonts will thus have a block character instead   For example  to select a layer named  Note  and add line feeds after all periods    var layerText   app activeDocument artLayers getByName  Note   textItem contents  layerText   layerText replace      g    r

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Get a line separator for the current browser   function getLineSeparator       var textarea   document createElement  textarea      textarea value     n      return textarea value

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yes use  n  unless you are generating html code  in which you want to use  lt br   gt

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A practical observation    In my NodeJS script I have the following function   function writeToLogFile  message        fs appendFile  myserverlog txt   Date           message     r n   function  err            if  err  throw err              First I had only   n  but I noticed that when I open the log file in Notepad  it shows all entries on the same line  Notepad   on the other hand shows the entries each on their own line  After changing the code to   r n   even Notepad shows every entry on its own line

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You can use    quotes  wich are below Esc button  with ES6  So you can write something like this   var text    fjskdfjslfjsl skfjslfkjsldfjslfjs jfsfkjslfsljs

[javascript] JavaScript string newline character?

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