Help Center/ Application Performance Management/ Service Overview（2.0）/ Metric Overview/ Web/HTML5/ JS Error Collection

Updated on 2025-11-19 GMT+08:00

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JS Error Collection

WebError is a collector to collect page error information. The information includes the categories, names, descriptions, units, data types, and default aggregation modes of metrics.

**Table 1** JS error metrics
Category	Metric	Name	Description	Unit	Data Type	Default Aggregation Mode
JS error metric set (JsError)	total	JS Errors	Total number of JS errors	-	INT	SUM
JS error metric set (JsError)	url	Last URL	Last URL that encounters a JS error	-	STRING	LAST

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