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      JS Intl.Collator compare()

      The Intl.Collator.prototype.compare() method compares two strings according to the sort order of this Collator object.

      The source for this interactive example is stored in a GitHub repository. If you’d like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

      Syntax

      collator.compare(string1, string2)
      

      Parameters

      string1

      string2

      The strings to compare against each other.

      Description

      The compare getter function returns a number indicating how string1 and string2 compare to each other according to the sort order of this Collator object: a negative value if string1 comes before string2; a positive value if string1 comes after string2; 0 if they are considered equal.

      Examples

      Using compare for array sort

      Use the compare getter function for sorting arrays. Note that the function is bound to the collator from which it was obtained, so it can be passed directly to Array.prototype.sort().

      var a = ['Offenbach', 'Österreich', 'Odenwald'];
      var collator = new Intl.Collator('de-u-co-phonebk');
      a.sort(collator.compare);
      console.log(a.join(', '));
      // → "Odenwald, Österreich, Offenbach"
      
      

      Use the compare getter function for finding matching strings in arrays:

      var a = ['Congrès', 'congres', 'Assemblée', 'poisson'];
      var collator = new Intl.Collator('fr', { usage: 'search', sensitivity: 'base' });
      var s = 'congres';
      var matches = a.filter(v => collator.compare(v, s) === 0);
      console.log(matches.join(', '));
      // → "Congrès, congres"
      
      

      Specifications

      SpecificationStatusComment
      [ECMAScript Internationalization API 1.0 (ECMA-402)
      The definition of ‘Intl.Collator.prototype.compare’ in that specification.](https://www.ecma-international.org/ecma-402/1.0/#sec-10.3.2)StandardInitial definition.
      [ECMAScript Internationalization API 2.0 (ECMA-402)
      The definition of ‘Intl.Collator.prototype.compare’ in that specification.](https://www.ecma-international.org/ecma-402/2.0/#sec-10.3.2)Standard 
      [ECMAScript Internationalization API 4.0 (ECMA-402)
      The definition of ‘Intl.Collator.prototype.compare’ in that specification.](https://tc39.es/ecma402/#sec-Intl.Collator.prototype.compare)Draft 

      See also

      目录
      目录