Real asynchronous javascript function -


does 

settimeout(function () { /*logic*/ }, 0);

really makes function asynchronous?

no not.

it places function on event queue given delay (here delay of zero). if there other functions queued execution, gets placed behind them , has wait until (including active) functions executed.

to test this, ethis

console.log( 'start' ); settimeout(function () {     console.log("timeout"); }, 0);  // long running code  console.log( 'end' );

you still output:

start

end

timeout


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