New line in JavaScript alert box

Question

How do you put in a new line into a JavaScript alert box

User · Answer

In JAVA app  if message is read from  properties  file   Due to double compilation java-html    you ll need double escape   jsp msg 1 First Line   nSecond Line   will result in   First Line Second Line

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x000D   x000D   alert  some text nmore text in a new line    x000D   x000D   x000D     x000D   x000D  alert  Line 1 nLine 2 nLine 3 nLine 4 nLine 5    x000D   x000D   x000D

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You can use  n for new line  alert  Welcome nto Jumanji       x000D   x000D  alert  Welcome nto Jumanji    x000D   x000D   x000D

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Just in case this helps anyone  when doing this from C  code behind I had to use a double escape character or I got an  unterminated string constant  JavaScript error   ScriptManager RegisterStartupScript this  this GetType     scriptName    alert   Line 1   n  nLine 2        true

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Works with  n but if the script is into a java tag you must write    n   lt script type  text javascript  gt alert  text ntext    lt  script gt    or   lt h commandButton action    XXXXXXX xxxxxxxxxx   value  XXXXXXXX       onclick  alert  text   ntext       gt

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As of ECMAScript 2015 you can use back-ticks       to enclose Template Literals for multi-line strings like this    x000D   x000D  alert  Line1 x000D  Line2    x000D   x000D   x000D    Outputs   Line1 Line2

User · Answer

use the new line character of a javascript instead of   n     eg   Hello nWorld  use  Hello x0AWorld   It works great

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I used    n r  - it only works in double quotes though   var fvalue    foo   var svalue    bar   alert  My first value is      fvalue     n rMy second value is      svalue    will alert as   My first value is  foo My second value is  bar

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n will put a new line in -  n being a control code for new line    x000D   x000D  alert  Line 1 nLine 2    x000D   x000D   x000D

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Thanks for the hints   Using the     sign is the only way I could get it to work   This is the last line of a function that adds some numbers   I m just learning JavaScript myself   alert  Line1  The sum is      sum     n     Line 2

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When you want to write in javascript alert from a php variable  you have to add an other     before   n   Instead the alert pop-up is not working   ex    PHP    text    Example Text    n   text2    Example Text     n   JS  window alert   lt  php echo  text    gt         not working window alert   lt  php echo  text2    gt         is working

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you have to use double quotes to display special char like  n  t etc    in js alert box for exemple in php script    string    Hello everybody  n this is an alert box   echo   lt script gt alert    string    lt  script gt      But a second possible problem arrives when you want to display a string specified in double quoted    see link text  If the string is enclosed in double-quotes      PHP will interpret more escape sequences for special characters  escape sequences  n is transformed as 0x0A ASCII Escaped character and this character is not displayed in the alert box  The solution consists in to escape this special sequence    s    Hello everybody   n this is an alert box   echo   lt script gt alert    string    lt  script gt      if you don t know how the string is enclosed you have to transform special characters to their escape sequences   patterns   array              n       r       t       v       f      replacements   array             n     r     t     v     f     string   preg replace  patterns   replacements   string   echo   lt script gt alert    string    lt  script gt

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x000D   x000D   alert  some text nmore text in a new line    x000D   x000D   x000D    Output      some text   more text in a new line

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alert  quot text nnew Line Text quot     Documentation  Window alert    Firefox   Chrome   Edge

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I saw some people had trouble with this in MVC  so    a simple way to pass   n  using the Model  and in my case even using a translated text  is to use HTML Raw to insert the text  That fixed it for me  In the code below  Model Alert can contains newlines  like  Hello nWorld      alert   Html Raw Model Alert

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In C  I did   alert  Text  n  nSome more text      It display as      Text        Some more text

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A new line character in javascript can be achieved by using  n This can be done using alert  quot first line  n second line  n third line quot     Output    first line second line third line  here is a jsfiddle prepared for the same

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x000D   x000D  alert  The transaction has been approved  nThank you    x000D   x000D   x000D    Just add a newline  n character   alert  The transaction has been approved  nThank you

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List of Special Character codes in JavaScript   Code    Outputs     single quote     double quote     backslash  n  new line  r  carriage return  t  tab  b  backspace  f  form feed

User · Answer

n won t work if you re inside java code though    lt   System out print   lt script gt alert  Some  n text   lt  script gt       gt    I know its not an answer  just thought it was important

[javascript] New line in JavaScript alert box

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