Interested in the terminology itself. Is Ajax like asynchronous javascript? But the Internet is full of contradictory information, somewhere they write that ajax can be both synchronous and asynchronous, and somewhere that only asynchronous. And so the question is, for example, if the site is dynamically updated news block without reloading the page

1) synchronously, when the whole page is blocked until the answer comes, is it ajax or not?
2) asynchronously, when nothing is blocked - is it ajax or not?

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    and this and that ajax , oddly enough it can be either synchronous or not, read HERE - Rostyslav Kuzmovych

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Ajax can really be asynchronous, several threads open at once, and synchronous, one stream. The fact is that Ajax is just a call, “asynchronous JS”, ​​in fact, and right to call it, XMLHttpRequest, there is no appeal in this name, technology.