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    Variable

    Last updated: 2024-11-21 18:34:18
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      Concepts

      Variables in WXS are references to values;
      Variables that are not declared and used by direct assignment are defined as global variables;
      If a variable is declared without being assigned a value, the default value is undefined;
      var behaves in the same way as javascript, there will be variable lifting.
      var foo = 1;
      var bar = "hello world";
      var i; // i === undefined
      In the above code, three variables foo, bar and i are declared. Then, foo is assigned the value 1 and bar is assigned the string "hello world".

      Variable Naming

      Variable naming must conform to the following two rules:
      The first character must be: letter (a-zA-Z), underscore (_);
      The remaining characters can be: letters (a-zA-Z), underscore (_), numbers (0-9).

      Reserved Identifier

      The following identifiers cannot be used as variable names:
      delete
      void
      typeof
      
      null
      undefined
      NaN
      Infinity
      var
      
      if
      else
      
      true
      false
      
      require
      
      this
      function
      arguments
      return
      
      for
      while
      do
      break
      continue
      switch
      case
      default
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