export function installJson5(Prism: any) {
  const string = /("|')(?:\\(?:\r\n?|\n|.)|(?!\1)[^\\\r\n])*\1/;

  Prism.languages.json5 = Prism.languages.extend('json', {
    property: [
      {
        pattern: RegExp(string.source + '(?=\\s*:)'),
        greedy: true,
      },
      {
        pattern: /[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*:)/,
        alias: 'unquoted',
      },
    ],
    string: {
      pattern: string,
      greedy: true,
    },
    number: /[+-]?(?:NaN|Infinity|0x[a-fA-F\d]+|(?:\d+\.?\d*|\.\d+)(?:[eE][+-]?\d+)?)/,
  });
}