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Methods carry the same names in JavaScript as in .NET. They hang off PeFunction, spelled exactly as the desktop spells them, so a property block transcribed from a WinForms, WPF or WinUI application calls them unchanged.
This was not true before 08/18/2026. Earlier builds carried only lower-case aliases on the control, and code written against the desktop spelling raised a TypeError. It no longer does.
How Many, Per Chart Object
The method surface follows the chart object, the same way the property surface does. A method that has no meaning for a chart type is not present on it.
On Every Chart Object
.NET |
JavaScript |
Notes |
| ReinitializeResetImage |
PeFunction.ReinitializeResetImage() |
Applies pending property writes and re-images. The desktop call every property block ends with. |
| Reinitialize |
PeFunction.Reinitialize() |
Applies pending writes without re-imaging. |
| Reset |
PeFunction.Reset() |
Returns every property to its default. |
| ResetImage |
PeFunction.ResetImage(0, 0) |
Re-images at the current size. A non-zero size is refused -- the web control owns its size, so call chart.setSize(w, h) instead. |
| DrawTable |
PeFunction.DrawTable(nTable) |
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| GetHotSpot |
PeFunction.GetHotSpot(x, y) |
Runs a hit test and returns the type. With no arguments it tests at the last mouse position and returns the full data object. |
| GetHotSpotData |
PeFunction.GetHotSpotData() |
Reads the struct the last test filled and runs no new test. Returns type, data1, data2 and rect. This is what an event handler calls. |
| GetRectGraph |
PeFunction.GetRectGraph() |
Returns left, top, right, bottom, width, height, ok. |
On The X/Y Chart Objects
SearchSubsetPointIndex is on Pego and Pesgo; SetExtraAxisX and SetExtraAxisTX are on Pesgo alone. Pego and Pesgo carry all of the others. Pepso carries ConvPixelToGraph, GetGraphLoc and UndoZoom; Pe3do and Pepco carry none of them.
.NET |
JavaScript |
Notes |
| GetRectAxis |
PeFunction.GetRectAxis(n) |
With no argument, reads the axis Grid.WorkingAxis currently points at. With n, reads that axis and puts the working axis back. |
| GetRectZoomWindow |
PeFunction.GetRectZoomWindow() |
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| GetGraphLoc |
PeFunction.GetGraphLoc() |
Describes the last hit test and has no freshness flag. Call GetHotSpot(x, y) first, or read it inside a PeGraphHotSpot handler. |
| ConvPixelToGraph |
PeFunction.ConvPixelToGraph(x, y, opts) |
.NET passes five ref parameters; they cannot cross this boundary, so the inputs are arguments and the outputs are the returned object. opts takes axisIndex, rightAxis, topAxis, viceVersa. |
| UndoZoom |
PeFunction.UndoZoom() |
Runs the engine own menu command, so it raises PeZoomOut exactly as a Undo Zoom from the menu does. |
| GetSpringDayLight |
PeFunction.GetSpringDayLight() |
Returns all nine time fields. |
| GetFallDayLight |
PeFunction.GetFallDayLight() |
Returns all nine time fields. |
| SetSpringDayLight |
PeFunction.SetSpringDayLight(month, day, hour) |
Zeroes Year, Minute, Second, MilliSecond and YearDay, exactly as the desktop method does. |
| SetFallDayLight |
PeFunction.SetFallDayLight(month, day, hour) |
Same, and the same zeroing. |
| SearchSubsetPointIndex |
PeFunction.SearchSubsetPointIndex(x, y) |
Which data point is nearest a pixel, as opposed to what is under it -- that is GetHotSpot. Returns {x: -1, y: -1} when nothing is found, so test the result before reading it. |
| SetExtraAxisX |
PeFunction.SetExtraAxisX(min, max, label, ...) |
An extra bottom-X axis. Pesgo only. Purely visual -- .NET's own summary says these are not associated with any data. Set Grid.WorkingAxis first. |
| SetExtraAxisTX |
PeFunction.SetExtraAxisTX(min, max, label, ...) |
The same, for a top-X axis. Pesgo only. |
On Pe3do Only
.NET |
JavaScript |
Notes |
| GetViewingAt |
PeFunction.GetViewingAt() |
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| SetViewingAt |
PeFunction.SetViewingAt(x, y, z) |
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| GetLight |
PeFunction.GetLight(index) |
Returns the values as written, plus working, the engine own scaled copy. A caller proving a light took should read working, not its own input. |
| SetLight |
PeFunction.SetLight(index, x, y, z) |
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| PEreconstruct3dpolygons |
PeFunction.PEreconstruct3dpolygons() |
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Two That Have No .NET Twin
ctl.render() | The call every chart ends with, and the one this help teaches. It does what ReinitializeResetImage does on the desktop. See the Walkthrough. |
ctl.flush() | Pushes pending property writes to the engine without drawing. Rarely needed; render() flushes first. |
The Rest Of The Method Reference
The other methods in this reference are not callable from JavaScript in v11, and they say so when you call them. They are present on PeFunction and each one throws with the reason it is not backed, rather than failing as an undefined function. Their names are also listed on PeFunction.NotAvailable, so a page can check without calling one.
They are the families that have no meaning in a browser: printing (PrintGraph and its Ex form), the Win32 object store (SaveObjectToFile, LoadFromURL and their stream siblings), the Partial family, resource-DLL swapping and ActiveX serialization.
How many depends on the chart object, because a method absent from an object entirely is not listed there: 17 on Pego and Pesgo, 16 on Pepso, 14 on Pe3do and Pepco.
A method topic with no JS line at the top is one of these. Nothing about it applies to a browser chart in this release.
Jagged Data Is Separate
SetJaggedPointsX and GetJaggedPointsX, with their Y and Z siblings, hang off PeData as they do in .NET, not off PeFunction.
See also ProEssentialsJS Overview, JS / .NET Events Reference, JS / .NET Charts Reference.
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