JavaScript Functionality Test

Interactive Tests

Test Alert Test Console Log Test Math Operations Test Date/Time Test Array Methods

Counter Test

Click count: 0

Increment Reset

Timer Test

Elapsed: 0 seconds

Start Timer

Storage Test (Memory-Based)

Testing in-memory storage simulation

Save Data

Save

Load Data

Load

Stored Data

Show All Data Clear All

Canvas Rendering Test

Draw Shapes Draw Text Draw Gradient Clear Canvas

External API Test

Fetch Test

Test Fetch API Test JSONPlaceholder

CORS Test

Tests if your hosting supports cross-origin requests

Test CORS