How long can a tweet be?

skeddles · 2018-08-22T16:20:45.648Z

I’m using The twitter-text library to count the length of my tweets, but what is the limit that the weightedLength can be? I don’t see it listed anywhere (and don’t understand why that is).

LeBraat · 2018-08-27T19:18:50.196Z

There is no static “limit” as it depends on the weight of the characters. You can use the following UI to test different strings to determine the weight:

https://npm.runkit.com/twitter-text

skeddles · 2018-08-30T02:14:37.826Z

Yeah but what’s the limit to the weight? Why am I determining the weight?

andypiper · 2018-08-30T13:27:19.109Z

You shouldn’t need to determine the weight - this is a configuration item. You’ll find the values for v2 of twitter-text in this file

github.com

twitter/twitter-text/blob/master/config/v2.json

{
  "version": 2,
  "maxWeightedTweetLength": 280,
  "scale": 100,
  "defaultWeight": 200,
  "transformedURLLength": 23,
  "ranges": [
    {
      "start": 0,
      "end": 4351,
      "weight": 100
    },
    {
      "start": 8192,
      "end": 8205,
      "weight": 100
    },
    {
      "start": 8208,
      "end": 8223,

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If you’re unclear on the point of “weighting”, this is to enable certain character sets (primarily CJK) to use a different value. Read this document for more information.

Calling the validation function should do what you need, but if you want to count in realtime, you’ll need to reproduce the algorithm from the document linked above.

system · 2018-09-13T13:27:22.795Z

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