Category: Appsmith Support


This solution is summarized from an archived support forum post. This information may have changed. If you notice an error, please let us know in Discord.

Unable to access variable outside of function when invoked as setInterval callback


I defined a function called func1 which works fine when called normally. However, when I passed it as a callback to setInterval, it could not access the variable outside the function. This issue is present in nodejs, but I am not sure if it is a bug or my mistake. I received an error message about not being able to access outer functions when trying to use clearInterval in setInterval's callback. A temporary workaround suggested by appsmith was to use appsmith store.


The issue is that a function passed as a callback to setInterval or other functions may not be able to access variables defined outside of it. One possible workaround is to use the Appsmith store to store the variables and access them from the callback function. Here's an example of how to do this:

(function() {  const store = Symbol();  const func1 = function() {    let v1 =[store].v1;    console.log(v1);  };[store] = { v1: 0 };  setInterval(func1, 1000, 'test');})();

In this example, the variable v1 is stored in the Appsmith store using a symbol as the key. The func1 callback function retrieves the value of v1 from the store and logs it. The setInterval method is passed func1 as a callback and runs it every second. This allows func1 to access v1 even though it is defined outside of the function.