javascript return true or return false when and how to use it

Question

So I see a lot of JavaScript code  have written some myself  that does something like   lt script gt  function CallSomeFunction          function body      document  ready function       callSomeFunction     return false        and at other times   callSomeFunction    return true    Basically I ve never understood the true use of the return true false after function calls in JavaScript  I ve just assumed its some kind of magic I need my functions to run well   So please I d like to know why  why do we use return true or return false after calling a JavaScript function

User · Answer

returning true or false indicates that whether execution should continue or stop right there. So just an example

<input type="button" onclick="return func();" />

Now if func() is defined like this

function func()
{
 // do something
return false;
}

the click event will never get executed. On the contrary if return true is written then the click event will always be executed.

User · Answer

Your code makes no sense  maybe because it s out of context   If you mean code like this      a   click function          callFunction        return false        The return false will return false to the click-event  That tells the browser to stop following events  like follow a link  It has nothing to do with the previous function call  Javascript runs from top to bottom more or less  so a line cannot affect a previous line

User · Answer

I think a lot of times when you see this code  it s from people who are in the habit of event handlers for forms  buttons  inputs  and things of that sort   Basically  when you have something like      lt form onsubmit  return callSomeFunction     gt  lt  form gt    or   lt a href     onclick  return callSomeFunction     gt  lt  a gt     and callSomeFunction   returns true  then the form or a will submit  otherwise it won t   Other more obvious general purposes for returning true or false as a result of a function are because they are expected to return a boolean

[javascript] javascript return true or return false when and how to use it?

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