30-seconds-of-code/snippets/truncateAtSpace.md

title, tags

title	tags
truncateAtSpace	string,beginner

Truncates a string up to the nearest space before a specified length.

• Checks if there string can be truncated
• Calculates the nearest space before or at the strings set limit.
• Appends a configurable ending (defaulting to '...') to the truncated string.

const truncateAtSpace = (string, characterLimit, ending = '...') => {
  const lastSpace = string.slice(0, characterLimit + 1).lastIndexOf(' ');
  return (string.length <= characterLimit) ? string : (lastSpace > 0) ? string.slice(0, lastSpace) + ending : ending;
}

truncateAtSpace('This is a long excerpt that is far too long.', 25, '...'); // This is a long excerpt...