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document.accessibilityAttributeNames.has(AXLoadingProgress)='yes' document.accessibilityAttributeValue(AXLoadingProgress)=1 not_applicable.accessibilityAttributeNames.has(AXLoadingProgress)='no' // Test of AccessibilityAttributeValue for "not applicable" element is // necessary because the value can be requested. not_applicable.accessibilityAttributeValue(AXLoadingProgress)=1