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Lodash _.truncate



The Lodash _.truncate() method is a convenient utility function that truncates a string to a specified length. It accomplishes this by either truncating the string down to a specified number of characters or appending an ellipsis ("...") to the end of the string to indicate that information has been omitted.

One of the primary use cases for this method is when you need to display snippets or previews of long blocks of text. Rather than displaying the entire text block, you can use _.truncate() to display a shortened version while still providing users with the key information they need.


The _.truncate() method takes two arguments: the string to truncate and an options object that specifies how the truncation should be performed. Here is the basic syntax for the method:

_.truncate(string, [options])


string (string): The string to truncate. [options] (Object): The options object.


The options object can have the following properties:

  • length (number): The maximum length of the truncated string. Defaults to 30.
  • omission (string): The string to append to the end of the truncated string to indicate that information has been omitted. Defaults to "...".
  • separator (RegExp | string): The separator pattern to use for truncation. This is useful when you want to truncate text to the end of a word or sentence rather than a specific character count.

Return Value:

The _.truncate() method returns the truncated string.


Here are some examples of how you can use _.truncate() to truncate strings:

_.truncate('Hello, world!', { length: 8 });
// => 'Hello...'

_.truncate('Hello, world!', { length: 8, omission: ' [more]' });
// => 'Hello [more]'

_.truncate('Hello, world!', { separator: ' ' });
// => 'Hello,'

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