MSIE
JavaScriptEngineSwitcher.Msie contains a MsieJsEngine adapter (wrapper for the MSIE JavaScript Engine for .NET).
For correct working of the MSIE JavaScript Engine it is recommended to install Internet Explorer 9+ or Microsoft Edge Legacy on the machine.
You can specify a settings of JS engine during its registration:
engineSwitcher.EngineFactories
.AddMsie(new MsieSettings
{
EngineMode = JsEngineMode.ChakraIeJsRt
})
;If you manually create an instance of JS engine, then you can pass settings via the constructor:
IJsEngine engine = new MsieJsEngine(
new MsieSettings
{
EngineMode = JsEngineMode.ChakraIeJsRt
}
);Consider in detail properties of the MsieSettings class:
| Property name | Data type | Default value | Description |
|---|---|---|---|
| AllowReflection | Boolean | false |
Flag for whether to allow the usage of reflection API in the script code. This affects Object.GetType, Exception.GetType, Exception.TargetSite and Delegate.Method. |
| EnableDebugging | Boolean | false | Flag for whether to allow debugging in Visual Studio by adding the debugger statement to script code. |
| EngineMode | JsEngineMode enumeration | Auto | JS engine mode. Can take the following values:
|
| MaxStackSize | Int32 | 503 808 or 1 007 616 |
Maximum stack size in bytes. Set a 0 to use the default maximum stack size specified in the header for the executable. Not supported in version for .NET Core 1.X. |
| UseEcmaScript5Polyfill | Boolean | false | Flag for whether to use the ECMAScript 5 Polyfill. |
| UseJson2Library | Boolean | false | Flag for whether to use the JSON2 library |
MSIE JavaScript Engine for .NET has support of the debugging in Visual Studio 2010-2012. In addition, debuggable script must contain a debugger statement (see MSDN for more details).
Here are steps, that you need to do for start of debugging:
-
Switch the solution in debug mode.
-
Set the EnableDebugging property of the MsieSettings class to true.
-
Add the debugger statements in debuggable script code.
-
Click on the Start button.
-
In opened the Visual Studio Just-In-Time Debugger window select the New instance of Microsoft Visual Studio 2012 item:
-
In the Visual Studio debugger window open the script block(s) and set breakpoint(s):
-
Return to the main Visual Studio window and click on the Continue button.