// A simple way to check for HTML strings or ID strings
      // Prioritize #id over  to avoid XSS via location.hash (#9521)
      quickExpr = /^(?:[^#<]*(<[\w\W]+>)[^>]*$|#([\w\-]*)$)/,
    
      // Check if a string has a non-whitespace character in it
      rnotwhite = /\S/,
    
      // Used for trimming whitespace
      trimLeft = /^\s+/,
      trimRight = /\s+$/,
    
      // Check for digits
      rdigit = /\d/,
    
      // Match a standalone tag
      rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,
    
      // JSON RegExp
      rvalidchars = /^[\],:{}\s]*$/,
      rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
      rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
      
      // Matches dashed string for camelizing
      rdashAlpha = /-([a-z]|[0-9])/ig,
      rmsPrefix = /^-ms-/,