Monkey Patches
All the data that Highlight collects is provded by running the Highlight snippet on your app. When the Highlight snippet runs, it monkey patches browser APIs in order to record things like:
Errors
Console messages
Network requests
Changes on the page
Here is a list of all the browser APIs that Highlight monkey patches
window.sessionStorage.setItem
window.sessionStorage.getItem
window.sessionStorage.removeItem
window.onerror
window.fetch
window.FontFace
window.scroll
window.scrollTo
window.scrollBy
window.scrollIntoView
window.WebGLRenderingContext
window.WebGL2RenderingContext
window.CanvasRenderingContext2D
window.HTMLCanvasElement
window.CSSStyleSheet.prototype.insertRule
window.CSSStyleSheet.prototype.deleteRule
window.CSSGroupingRule
window.CSSMediaRule
window.CSSConditionRule
window.CSSSuportsRule
window.CSSStyleDeclaration.prototype.setProperty
window.CSSStyleDeclaration.prototype.removeProperty
history.pushState
history.replaceState
XMLHttpRequest.prototype.open
XMLHttpRequest.prototype.setRequestHeader
XMLHttpRequest.prototype.send
console.assert
console.clear
console.count
console.countReset
console.debug
console.dir
console.dirxml
console.error
console.group
console.groupCollapsed
console.groupEnd
console.info
console.log
console.table
console.time
console.timeEnd
console.timeLog
console.trace
console.warn