Insert Unicode character into JavaScript

Question

I need to insert an Omega    937   onto my html page  I am using its HTML escaped code to do that  so I can write  amp  937  and get   937   That s all fine and well when I put it into a HTML element  however  when I try to put it into my JS  e g  var Omega    amp  937   it parses that code as JS and the whole thing doesn t work  Anyone know how to go about this

User · Accepted Answer

I m guessing that you actually want Omega to be a string containing an uppercase omega  In that case  you can write   var Omega     u03A9      Because  Omega  is the Unicode character with codepoint U 03A9  that is  03A9 is 937  except written as four hexadecimal digits

User · Answer

Although  ruakh gave a good answer  I will add some alternatives for completeness   You could in fact use even var Omega     amp  937   in JavaScript  but only if your JavaScript code is    inside an event attribute  as in onclick  var Omega     amp  937   alert Omega   or  in a script element inside an XHTML  or XHTML      XML  document served with an XML content type    In these cases  the code will be first  before getting passed to the JavaScript interpreter  be parsed by an HTML parser so that character references like  amp  937  are recognized  The restrictions make this an impractical approach in most cases   You can also enter the O character as such  as in var Omega    O   but then the character encoding must allow that  the encoding must be properly declared  and you need software that let you enter such characters  This is a clean solution and quite feasible if you use UTF-8 encoding for everything and are prepared to deal with the issues created by it  Source code will be readable  and reading it  you immediately see the character itself  instead of code notations  On the other hand  it may cause surprises if other people start working with your code   Using the  u notation  as in var Omega     u03A9   works independently of character encoding  and it is in practice almost universal  It can however be as such used only up to U FFFF  i e  up to  uffff  but most characters that most people ever heard of fall into that area   If you need    higher    characters  you need to use either surrogate pairs or one of the two approaches above    You can also construct a character using the String fromCharCode   method  passing as a parameter the Unicode number  in decimal as in var Omega   String fromCharCode 937  or in hexadecimal as in var Omega   String fromCharCode 0x3A9   This works up to U FFFF  This approach can be used even when you have the Unicode number in a variable

User · Answer

One option is to put the character literally in your script  e g   const omega    O    This requires that you let the browser know the correct source encoding  see Unicode in JavaScript However  if you can t or don t want to do this  e g  because the character is too exotic and can t be expected to be available in the code editor font   the safest option may be to use new-style string escape or String fromCodePoint  const omega     u 3a9        or   const omega   String fromCodePoint 0x3a9    This is not restricted to UTF-16 but works for all unicode code points  In comparison  the other approaches mentioned here have the following downsides   HTML escapes  const omega     amp  937     only work when rendered unescaped in an HTML element old style string escapes  const omega     u03A9     restricted to UTF-16 String fromCharCode  restricted to UTF-16

User · Answer

The answer is correct  but you don t need to declare a variable  A string can contain your character    This string contains omega  that looks like this   u03A9    Unfortunately still those codes in ASCII are needed for displaying UTF-8  but I am still waiting  since too many years     the day when UTF-8 will be same as ASCII was  and ASCII will be just a remembrance of the past

[javascript] Insert Unicode character into JavaScript

Examples related to javascript

Examples related to html

Examples related to unicode