Javascript is disabled, short questions

Question

Just a few short questions regarding javascript and websites.

1. Is javascript enabled, does it mean that "sun java" is installed and enabled in the browser settings? Or does every browser always have javascript enabled?

2- If javascript is disabled, for example, my site does not work at all, so what do large developers do in these situations, if the only way to achieve their goal is to use javascript?

3- Is ajax also disabled if javascript is disabled? Also, for jQuery, because it is a javascript library?

Thanks guys,

Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 9

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