Why does != work and just = doesn't?

Question

Here\'s my code:

  if (document.getElementById(\"hiddenButton\").style.visibility != \"visible\") {
     document.getElementById(\"hiddenButton\").style.visibili         


        

Answer 1

Left = Right

This means, "Whatever the right side is, put it as the value for the left side."

All comparisons and other checks are done with two symbols to limit ambiguity and improper variable assignments when you simply meant to check a value.

!= means not equal to
== means equal
=== means equal and same object/datatype
= means "Assign the right side (Or what it evaluates to) to the variable on the left