useEnumInitializers

诊断类别：lint/style/useEnumInitializers

¥Diagnostic Category: lint/style/useEnumInitializers

TypeScript and TSX

自从：v1.0.0

¥Since: v1.0.0

来源：

¥Sources:

与以下相同：@typescript-eslint/prefer-enum-initializers

¥Same as: @typescript-eslint/prefer-enum-initializers

要求每个枚举成员值都明确初始化。

¥Require that each enum member value be explicitly initialized.

TypeScript 枚举是一种组织语义相关常量值的实用方法。没有明确值的枚举成员默认被赋予连续增加的数字。

¥TypeScript enums are a practical way to organize semantically related constant values. Members of enums that don’t have explicit values are by default given sequentially increasing numbers.

当枚举成员的值很重要时，如果枚举声明随着时间的推移而修改，允许枚举成员的隐式值可能会导致错误。

¥When the value of enum members are important, allowing implicit values for enum members can cause bugs if enum declarations are modified over time.

示例

¥Examples

无效

¥Invalid

enum Version {
    V1,
}

code-block.ts:1:6 lint/style/useEnumInitializers  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This enum declaration contains members that are implicitly initialized.
  
  > 1 │ enum Version {
      │      ^^^^^^^
    2 │     V1,
    3 │ }
  
  ℹ This enum member should be explicitly initialized.
  
    1 │ enum Version {
  > 2 │     V1,
      │     ^^
    3 │ }
    4 │ 
  
  ℹ Allowing implicit initializations for enum members can cause bugs if enum declarations are modified over time.
  
  ℹ Safe fix: Initialize all enum members.
  
    2 │ ····V1·=·0,
      │       ++++

enum Status {
    Open = 1,
    Close,
}

code-block.ts:1:6 lint/style/useEnumInitializers  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This enum declaration contains members that are implicitly initialized.
  
  > 1 │ enum Status {
      │      ^^^^^^
    2 │     Open = 1,
    3 │     Close,
  
  ℹ This enum member should be explicitly initialized.
  
    1 │ enum Status {
    2 │     Open = 1,
  > 3 │     Close,
      │     ^^^^^
    4 │ }
    5 │ 
  
  ℹ Allowing implicit initializations for enum members can cause bugs if enum declarations are modified over time.
  
  ℹ Safe fix: Initialize all enum members.
  
    3 │ ····Close·=·2,
      │          ++++

enum Color {
    Red = "Red",
    Green = "Green",
    Blue,
}

code-block.ts:1:6 lint/style/useEnumInitializers  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This enum declaration contains members that are implicitly initialized.
  
  > 1 │ enum Color {
      │      ^^^^^
    2 │     Red = “Red”,
    3 │     Green = “Green”,
  
  ℹ This enum member should be explicitly initialized.
  
    2 │     Red = “Red”,
    3 │     Green = “Green”,
  > 4 │     Blue,
      │     ^^^^
    5 │ }
    6 │ 
  
  ℹ Allowing implicit initializations for enum members can cause bugs if enum declarations are modified over time.
  
  ℹ Safe fix: Initialize all enum members.
  
    4 │ ····Blue·=·“Blue”,
      │         +++++++++

有效

¥Valid

enum Status {
    Open = 1,
    Close = 2,
}

enum Color {
    Red = "Red",
    Green = "Green",
    Blue = "Blue",
}

declare enum Weather {
    Rainy,
    Sunny,
}

useEnumInitializers

示例

无效

有效

相关链接