The actual difference between Javascript's
== and
=== operators is that the
== operator is less strict when comparing the operands. For example,
1=="1" evaluates to
true while
1==="1" evaluates to
false.
Full description can be found on ECMAScript standard, at
http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf, on chapter
11.9.
A practical tip to quickly understand "what would
== do" is to illustrate what will happen when you call
.toString() on both operands. Thinking that way, it will make sense that
1.toString()=="1". This is
not the precise algorithm for
==, but it does provide a good approximation, useful for daily work.
