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To allow JScript.NET to execute with optimal performance, the JScript .NET in Confirmit surveys will be compiled in fast mode. As fast mode places some restrictions on the type of code allowed, programs can be more efficient and execute faster. However, some features are not available in fast mode.
In fast mode, the following JScript behaviors are triggered:
- All variables must be declared.
- Functions become constants.
- Intrinsic objects cannot have expanded properties.
- Intrinsic objects cannot have properties listed or changed.
- The arguments object is not available.
- Cannot assign to a read-only variable, field, or method.