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util: add getStringWidth() - #66642
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marcopiraccini wants to merge 1 commit into
Closed
marcopiraccini wants to merge 1 commit into
marcopiraccini wants to merge 1 commit into
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Expose the string width helper that readline, the REPL and the test runner already use. It returns the number of terminal columns a string occupies: full-width characters count as two, zero-width characters as zero, and ANSI escape sequences are ignored. The API is experimental. Refs: nodejs#40214 Signed-off-by: marcopiraccini <marco.piraccini@gmail.com>
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This needs more investigation, actually. Closing for the time being. |
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Expose
getStringWidth()frominternal/util/inspectasutil.getStringWidth(str), marked experimental.It returns an estimate of the terminal columns a string takes: full-width characters count as two, zero-width characters as zero, and ANSI escape sequences are ignored. Node.js already uses it in
readline, the REPL,util.inspect()and the test runner;string-widthon npm serves the same need (about 520M downloads a week), and Bun and Deno expose equivalents.The ICU options (
ambiguousAsFullWidth,expandEmojiSequence) are not exposed yet, which is why the API starts as experimental. Joined emoji sequences are counted per component.Precedent:
util.stripVTControlCharacters(), exposed the same way in #40214.Refs: #40214