</>SkillRecallRECALL WHAT YOU KNOW
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TypeScriptEnums & Literal Types

37 items

1

Boolean Literal Type

Code Quiz
2

Value Outside Literal Union

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3

Accessing Enum Members

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4

Enum As Type Annotation

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5

const enum Reverse Mapping

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6

Numeric Literal Type

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7

Numeric Enum Initialization

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8

String Enum Requires Initializers

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9

let vs const Literal Widening

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10

Numeric Literal Types

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11

Explicit Numeric Enum Values

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12

String Enum Declaration

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13

Accessing Enum Members

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14

Enum as a Type Annotation

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15

Reverse Mapping in Numeric Enums

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16

const Enums

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17

Enum Runtime Object Behavior

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18

Boolean Literal Types

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19

Literal Types in Union

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20

Literal Type Widening

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21

Enum vs Union of Literals

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22

Auto-incrementing Enum Values

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23

const Assertions (as const)

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24

Reverse Mapping in Numeric Enums

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25

const Enums

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26

Enums vs Union of Literal Types

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27

String Enums

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28

Heterogeneous Enums

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29

Boolean Literal Types

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30

Numeric Literal Types

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31

Enum as a Type Annotation

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32

Accessing Enum Members

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33

Literal Type Widening

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34

Combining Literal Types with Unions

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35

Custom Numeric Enum Initializers

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36

Auto-incrementing Enum Values

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37

How Enums Compile to JavaScript

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Code QuizBeginner

let vs const Literal Widening

Understand why a let variable widens a string literal and breaks assignment to a literal type.

Codetypescript
type Direction = "left" | "right";

function move(d: Direction) {
  console.log(`Moving ${d}`);
}

let dir = "left";
move(dir);

This code fails to compile. What is the bug and how do you fix it?