Creating an Indefinite Animated Loading Bar in Dash (Python Dashboard Tutorial)
In this video, you'll learn how to build a custom animated loading bar using Dash and Bootstrap, perfect for web dashboards or internal tools where you want to show ongoing activity without relying on a spinner.
Python File : https://www.kaggle.com/code/krpurba/d...
CSS Here :
---------------------------------
/* indefinite progress bar */
.loadingbar{
position:fixed;
width:100vw;
height:31px;
top:0px;
left:0px;
z-index:1000;
overflow-x: hidden;
}
.loadingbar .line{
position:absolute;
opacity: 0.4;
background:#75a7ff;
width:150%;
height:3px;
}
.loadingbar .subline{
position:absolute;
background:#75a7ff;
height:3px;
}
.inc{
animation: increase 2s infinite;
}
.dec{
animation: decrease 2s 0.5s infinite;
}
@keyframes increase {
from { left: -5%; width: 5%; }
to { left: 130%; width: 100%;}
}
@keyframes decrease {
from { left: -80%; width: 80%; }
to { left: 110%; width: 10%;}
}
/* end of indefinite progress bar */
---------------------------------
🚀 What this video covers:
Creating a smooth, indefinite loading animation with custom HTML & CSS
Using Dash callbacks to control when the loading bar appears and disappears
Simulating data loading with a delay (`time.sleep`)
Updating content dynamically after loading completes
Working with `datetime.now()` to show live timestamps
Preparing CSS asset folder
💡 Unlike default dcc.Loading or dcc.Spinner, this example gives you full control over the look and timing of your loader — great for stylized dashboards!
📦 Tech stack:
Dash (Python)
Dash Bootstrap Components
HTML + CSS animation
Python `datetime`
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📌 Tags
`dash loading bar, dash custom loader, python dash tutorial, python dashboard, dash bootstrap, animated loading bar, simulate loading in dash, data loading in dashboards, dash ui components, ArkCoding, dynamic dashboard python, web dashboard python, loading indicator`
#DashPython #PythonDashboard #CustomLoadingBar #ArkCoding #WebDashboard #DashTutorial #PythonForBeginners #UIinPython #InteractiveDashboard