Printing emojis with JavaScript and HTML

by

A ‘char’ in JS terms is actually a UTF-16 code unit, not a full Unicode character. (This sad state of affairs stems from ancient times when there wasn’t a difference*.) To use a character outside of the Basic Multilingual Plane you have to write it in the UTF-16-encoded form of a surrogate pair of two 16-bit code units:

String.fromCharCode(0xD83D, 0xDE04)

In ECMAScript 6 we will get some interfaces that let us deal with strings as if they were full Unicode code points, though they are incomplete and are only a façade over the String type which is still stored as a code unit sequence. Then we’ll be able to do:

String.fromCodePoint(0x1F604)

See this question for some polyfill code to let you use this feature in today’s browsers.

(*: When I get access to a time machine I’m leaving Hitler alone and going back to invent UTF-8 earlier. UTF-16 must never have been!)

More Related Contents:

  1. How to prevent Unicode characters from rendering as emoji in HTML from JavaScript?
  2. What is the character code for enter? [closed]
  3. How to remove emoji code using javascript?
  4. \u200b (Zero width space) characters in my JS code. Where did they come from?
  5. How can I split a string containing emoji into an array?
  6. Insert Unicode character into JavaScript
  7. How can I select an element by name with jQuery?
  8. jQuery disable/enable submit button
  9. Why split the tag when writing it with document.write()?
  10. How to resolve the C:\fakepath?
  11. Remove zero-width space characters from a JavaScript string
  12. Convert binary data to base64 with javascript
  13. How to reset the bootstrap modal when it gets closed and open it fresh again?
  14. How to set a Header field on POST a form?
  15. HTML5 canvas ctx.fillText won’t do line breaks?
  16. Python library for rendering HTML and javascript [closed]
  17. Parse JavaScript with jsoup
  18. How do I disable the save password bubble in chrome using Javascript?
  19. How to Call a JS function using OnClick event [duplicate]
  20. Highcharts – issue about full chart width
  21. How to detect when history.pushState and history.replaceState are used? [duplicate]
  22. How do I select the innermost element?
  23. Detect browser wrapped lines via javascript
  24. Multiple read more / read less sections are not working on a page
  25. Popstate on page’s load in Chrome
  26. HTML5 Dynamically create Canvas
  27. Drawing lines on html page
  28. Reload an IFRAME without adding to the history
  29. Record voice from IPhone using HTML5
  30. How to highlight a part part of an Input text field in HTML using Javascript or JQuery

Leave a Comment