? jQuery Queue

? Quick Overview

jQuery Queue is used to manage and control a sequence of functions that execute one after another on selected elements. It is most commonly used with animations, but it can also manage custom tasks.

? Key Concepts

Queue stores functions in order
Each function must call next() to continue
Default queue name is fx
Custom queues can be created

? Syntax / Theory

jQuery provides the .queue() and .dequeue() methods to work with queues. Functions are executed sequentially.

? View Code Example

// Syntax of jQuery queue method
$(selector).queue(function(next){
console.log("Task running");
next();
});

? Code Example

? View Code Example

// Using jQuery queue to run tasks sequentially
$("#box").queue(function(next){
$(this).css("background","red");
next();
}).queue(function(next){
$(this).css("width","200px");
next();
}).queue(function(next){
$(this).css("height","200px");
next();
});

? Live Output / Explanation

The element changes its background color first, then its width, and finally its height. Each step waits for the previous one to complete.

? Interactive Example

Watch the status bar to see how the queue processes each function in order.

Queue Status:

• Step 1: Turn Green

• Step 2: Expand Width

• Step 3: Expand Height

• Step 4: Sequence Complete

? Use Cases

Sequential animations
Step-by-step UI transitions
Custom task pipelines
Controlling async UI behavior

? Tips & Best Practices

Always call next() inside queue functions
Use custom queues for non-animation logic
Clear queues when no longer needed

? Try It Yourself

Add a delay between queue steps
Create a custom named queue
Combine queue with animations