Make "required" optional in TypeScript typings #167
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LinusU
commented
Aug 10, 2018
| input.age === undefined | ||
| input.age === 1 | ||
| if (typeof input.age !== 'undefined') assertType<number>(input.age) | ||
| if (typeof input.age !== 'number') assertType<undefined>(input.age) |
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This dance is used since it's valid to pass a number to a function accepting number | undefined.
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