Function isValidSymbol

src/math-json/symbols.ts:62–76

(s: string)

    ];

    // Combine the recommended script properties into a single regex pattern
    const regexPattern = `^[${recommendedScripts
      .map((x) => `\\p{Script=${x}}`)
      .join('')}]*$`;

    recommendedScriptsRegex = new RegExp(regexPattern, 'u');
  }
  // Test if the input text contains only characters from the
  // recommended scripts
  return recommendedScriptsRegex.test(text);
}

/**
 * Return true if the string is a valid symbol.
 *
 * Check for symbols matching a profile of [Unicode UAX31](https://unicode.org/reports/tr31/)
 *
 * See https://cortexjs.io/math-json/#symbols for a full definition of the