• Exception handling. You can throw and catch exceptions using the throw and try...catch statements. See "throw" on page 243 and "try...catch" on page 246.
• New operators in and instanceof. The in operator returns true if the specified property is in the specified object; see "in" on page 269. The instanceof operator returns true if the specified object is of the specified object type; see "instanceof" on page 270.
• Changes to LiveConnect. Several changes to LiveConnect improve the way Java and JavaScript code communicate:

• The methods of java.lang.Object are inherited by JavaArray. In addition, the JavaArrary.toString method now calls the method java.lang.Object.toString. See "JavaArray" on page 98.
• You can pass a JavaClass object to a Java method which requires an argument of type java.lang.Class instead of creating a wrapper around an instance of java.lang.Class. See "JavaClass" on page 102.
• You cannot construct an instance of JSException with a detail message. The three original public constructors for the Java class netscape.javascript.JSException that supported this feature are deprecated. See "JSException" on page 280.
• You cannot use the == operator to compare two instances of JSObject. Use JSObject.equals. See "Comparison Operators" on page 256 and JSObject.equals.
• Changes to the eval method.

• The top-level eval method cannot be called indirectly. In previous versions, it was recommended that this method not be called indirectly; starting with JavaScript 1.4, calling eval indirectly could result in a runtime error. This change improves performance. See "eval" on page 214.
• The eval method is no longer available as a method of Object; use the top-level eval function instead. See "eval" on page 214.
• Changes to the Function object.

• You should no longer specify a function name when using the arguments array; the arguments array is a variable and is no longer a property of Function objects. This change improves performance. See "Function" on page 79 and "arguments" on page 85.
• Deprecated the Function.arity property. It has been replaced by the Function.length property. See "length" on page 92.

Last Updated: 10/29/98 20:16:58