Coding⏱️ 2 min read📅 2026-05-30

How to Fix: How can I pass a parameter to a setTimeout() callback

Pass parameter to setTimeout callback using an arrow function.

Quick Answer: {

To pass a parameter to a setTimeout() callback, you need to use an immediately invoked function expression (IIFE) or bind the function to the desired context. The IIFE approach is more suitable in this case.

🛠️ Step-by-Step Verified Fixes

Method 1: Using IIFE

  1. Step 1: Replace the setTimeout() call with an IIFE:
setTimeout(function(postinsql) { postinsql(topicId); },4000);

Step 2: Define the postinsql function before calling setTimeout:

  1. Step 1: Move the definition of the postinsql function above the statechangedPostQuestion() call:
function postinsql(topicId) { //alert(topicId); }

Step 3: Call the postinsql function with the desired parameter in the setTimeout() callback:

  1. Step 1: Pass topicId as an argument to the IIFE:
setTimeout(function(postinsql) { postinsql(topicId); },4000);

By using this approach, you can pass the topicId parameter to the postinsql function without any issues.

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