javascript - Check if global variable value has changed in last N seconds -

I am trying to write some javascript that the value of a global variable has changed in the last 10 seconds or not. My first idea is to use the setTimeout as follows:

  var glob = 0; // Global variables that can change the user by clicking a button / / The following code is whether the globe has var tmp_glob = glob in a 10-second period; SetTimeout (function (if (tmp_glob == globe) {console.log ("value is not changed.");}}, 10000);  

My argument is that, After having 10 seconds, Javascript will check that glob and tmp_gl are still the same and if they are, this means the globe < Code> tmp_glob has not been changed since. However, it always gives the truth, even if I change the glob from the customer, I'm 100% sure that the globe Why is my code not working? Alternatively, can I provide a better solution for what I am trying to accomplish?

Your code works just fine, but this is a very bad behavior and your problem may be overwritten in your tmp_glob One way to make it even stronger is to have your setTimeout must be attached to a function that is the owner of tmp_glob variable:

  function clock glob () {var tmp_g Lob = glob; Settimeout (function () {if (tmp_glob == glob) {console.log ("Value is not changed.");} Else {console.log ("value has changed"); tmp_glob = glob;}}, 10000 ); }  

Now when you want to start monitoring, you call:

  watchglob ();  

But you will not be able to overwrite tmp_glob externally.

See:

You started an instant work expression (IEEE) which you want to avoid defining the designated function for it:

  (function () {var tmp_glob = glob; setTimeout (function () {if (tmp_glob == Glob) {console.log ( "value has not changed.");} Else {console.log ( "value has changed" ); Tmp_glob = glob;}}, 10000);}) ();