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Which of the following constants has the value 255?

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Which of the following constants has the value 255?

(a) TYPE_NAVIGATE

(b) TYPE_RELOAD

(c) TYPE_BACK_FORWARD

(d) TYPE_RESERVED

I had been asked this question in semester exam.

I'd like to ask this question from Performance Navigation and Memory topic in section Invocation and Performance Navigation of JavaScript

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The correct answer is (d) TYPE_RESERVED

The explanation: TYPE_BACK_FORWARD performs navigation through a history traversal operation. TYPE_RESERVED Has the value of 255 and is a catch-all for any navigation type not defined above.

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