The no Compiler Options

Learn about several compiler options that are prefixed with the word no, and understand their functionality.

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There are also a number of compiler options that are prefixed with the word no. These options are similar to the strict options in that they further guard our code against things like unused parameters, implicit returns, and implicit any.

In this lesson, we will take a look at these compiler options and how they can detect potential errors within our code. These parameters are similar in nature to strict parameters in that they can be turned on or off and can be introduced into a code base gradually.

Note: If the strict compiler option has been set to true, then all of these options will be enabled as well.

The noImplicitAny option

When a type has not been specified for a property, parameter, or function return type, the TypeScript compiler will automatically assume that it is of type any. In strict mode, this will generate an error.

Consider the following code:

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