noUnreachableSuper

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/correctness/noUnreachableSuper

¥Diagnostic Category: lint/correctness/noUnreachableSuper
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则没有修复方案。

¥This rule doesn’t have a fix.
此规则的默认严重级别为 error。

¥The default severity of this rule is error.
来源：

¥Sources:
- 与 no-this-before-super 相同
  
  ¥Same as no-this-before-super

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "correctness": {
5
        "noUnreachableSuper": "error"
6
      }
7
    }
8
  }
9
}

描述

¥Description

如果类具有超类，则确保在访问 this 之前，在类构造函数中的每个代码路径上都只调用一次 super() 构造函数

¥Ensures the super() constructor is called exactly once on every code path in a class constructor before this is accessed if the class has a superclass

示例

¥Examples

无效

¥Invalid

1
class A extends B {
2
    constructor() {}
3
}

code-block.js:2:5 lint/correctness/noUnreachableSuper ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This constructor has code paths that return without calling `super()`.
  
    1 │ class A extends B {
  > 2 │     constructor() {}
      │     ^^^^^^^^^^^^^^^^
    3 │ }
    4 │ 
  
  ℹ If this is intentional, add an explicit throw statement in unsupported paths.

1
class A extends B {
2
    constructor(value) {
3
        this.prop = value;
4
        super();
5
    }
6
}

code-block.js:2:5 lint/correctness/noUnreachableSuper ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This constructor has code paths accessing `this` without calling `super()` first.
  
    1 │ class A extends B {
  > 2 │     constructor(value) {
      │     ^^^^^^^^^^^^^^^^^^^^
  > 3 │         this.prop = value;
  > 4 │         super();
  > 5 │     }
      │     ^
    6 │ }
    7 │ 
  
  ℹ `this` is accessed here:
  
    1 │ class A extends B {
    2 │     constructor(value) {
  > 3 │         this.prop = value;
      │         ^^^^
    4 │         super();
    5 │     }
  
  ℹ If this is intentional, add an explicit throw statement in unsupported paths.

1
class A extends B {
2
    constructor(cond) {
3
        if(cond) {
4
            super();
5
        }
6
    }
7
}

code-block.js:2:5 lint/correctness/noUnreachableSuper ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This constructor has code paths that return without calling `super()`.
  
    1 │ class A extends B {
  > 2 │     constructor(cond) {
      │     ^^^^^^^^^^^^^^^^^^^
  > 3 │         if(cond) {
  > 4 │             super();
  > 5 │         }
  > 6 │     }
      │     ^
    7 │ }
    8 │ 
  
  ℹ If this is intentional, add an explicit throw statement in unsupported paths.

有效

¥Valid

1
export default class A extends B {
2
    constructor() {
3
        super();
4
    }
5
}

1
export class A {
2
    constructor() {}
3
}

noUnreachableSuper

摘要

如何配置

描述

示例

无效

有效

相关链接