How to count the correct length of a string with emojis in javascript?

by

  1. str.length gives the count of UTF-16 units.

  2. Unicode-proof way to get string length in codepoints (in characters) is [...str].length as iterable protocol splits the string to codepoints.

  3. If we need the length in graphemes (grapheme clusters), we have these native ways:

    a. Unicode property escapes in RegExp. See for example: Unicode-aware version of \w or Matching emoji.

    b. Intl.Segmenter — coming soon, probably in ES2021. Can be tested with a flag in the last V8 versions (realization was synced with the last spec in V8 86). Unflagged (shipped) in V8 87.

See also:

More Related Contents:

  1. How do I get started with Node.js [closed]
  2. map function for objects (instead of arrays)
  3. Node JS Promise.all and forEach
  4. Missing credentials for “PLAIN” nodemailer
  5. How can I set response header on express.js assets
  6. How to do promise.all for array of array of promises?
  7. Node.js request CERT_HAS_EXPIRED
  8. Mongoose: Find, modify, save
  9. configure node express to serve static bower_components?
  10. Copy folder recursively in Node.js
  11. ReactJS server-side rendering vs client-side rendering
  12. Including JavaScript class definition from another file in Node.js
  13. Why and when to use Node.js? [duplicate]
  14. WebSocket connection failed: Error during WebSocket handshake: Unexpected response code: 400
  15. How to deploy a React + NodeJS Express application to AWS?
  16. Running a function everyday midnight
  17. Reverse-Mapping for String Enums
  18. JavaScript NoSQL Injection prevention in MongoDB
  19. Random document from a collection in Mongoose
  20. Node.js passing parameters to client via express render
  21. Opening images on NodeJS and finding out width/height
  22. How to return a promise when writestream finishes?
  23. MongooseError: Model.findOne() no longer accepts a callback at Function
  24. Import ‘.json’ extension in ES6 Node.js throws an error
  25. Maintaining the reference to “this” in Javascript when using callbacks and closures
  26. Grabbing a random line from file
  27. Electron nodeIntegration not working, also general weird Electron behavior [duplicate]
  28. Puppeteer wait for all images to load then take screenshot
  29. Does node.js support the ‘let’ statement?
  30. Cannot create a string longer than 0x1fffffe8 characters in JSON.parse?

Leave a Comment