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martin krause
martin krause

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1 line of code: How to truncate a string at word boundaries

const truncateAfterWord = (str, chars, placeholder = '') =>  str.length < chars ? str : `${str.substr( 0, str.substr(0, chars - placeholder.length).lastIndexOf(" "))}${placeholder}`;
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Returns the string truncated to the given amount of chars while preserving full words.

The repository & npm package

You can find the all the utility functions from this series at
The library is also published to npm as @onelinecode for your convenience.

The code and the npm package will be updated every time I publish a new article.

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Discussion (2)

moopet profile image
Ben Sinclair

I'm going to suggest an 80-character limit on "one line" code samples, because otherwise I could minimise the code for Excel and call it a one-liner!

lionelrowe profile image

I guess a reasonable interpretation of "one-liners" is anything you can reasonably do without semicolons or newlines.