[object Object] is JavaScript's default string representation of objects
The toString() method returns this string when objects are converted to strings
Main Scenarios
Appears when objects are passed to alert() popup
Occurs when toString() is called directly on objects
All objects inherit from Object.prototype, which defines toString()
Solutions
Use JSON.stringify() to display object contents in alert()
Pass objects directly to console.log() for full content display
Custom objects can override toString() for better debugging
Technical Details
JavaScript needs a default toString() method for dynamic objects
This string works well across all object types
Most JavaScript developers have encountered this default string
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