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(function (Prism) {
  Prism.languages.handlebars = {
    comment: /\{\{![\s\S]*?\}\}/,
    delimiter: {
      pattern: /^\{\{\{?|\}\}\}?$/,
      alias: 'punctuation',
    },
    string: /(["'])(?:\\.|(?!\1)[^\\\r\n])*\1/,
    number: /\b0x[\dA-Fa-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[Ee][+-]?\d+)?/,
    boolean: /\b(?:false|true)\b/,
    block: {
      pattern: /^(\s*(?:~\s*)?)[#\/]\S+?(?=\s*(?:~\s*)?$|\s)/,
      lookbehind: true,
      alias: 'keyword',
    },
    brackets: {
      pattern: /\[[^\]]+\]/,
      inside: {
        punctuation: /\[|\]/,
        variable: /[\s\S]+/,
      },
    },
    punctuation: /[!"#%&':()*+,.\/;<=>@\[\\\]^`{|}~]/,
    variable: /[^!"#%&'()*+,\/;<=>@\[\\\]^`{|}~\s]+/,
  };

  Prism.hooks.add('before-tokenize', function (env) {
    var handlebarsPattern = /\{\{\{[\s\S]+?\}\}\}|\{\{[\s\S]+?\}\}/g;
    Prism.languages['markup-templating'].buildPlaceholders(
      env,
      'handlebars',
      handlebarsPattern
    );
  });

  Prism.hooks.add('after-tokenize', function (env) {
    Prism.languages['markup-templating'].tokenizePlaceholders(
      env,
      'handlebars'
    );
  });

  Prism.languages.hbs = Prism.languages.handlebars;
})(Prism);