eslint/no-this-before-super Correctness

✅ This rule is turned on by default.

What it does

Requires calling super() before using this or super.

Why is this bad?

In the constructor of derived classes, if this/super are used before super() calls, it raises a ReferenceError.

Examples

Examples of incorrect code for this rule:

class A1 extends B {
  constructor() {
    // super() needs to be called first
    this.a = 0;
    super();
  }
}

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)

{
  "rules": {
    "no-this-before-super": "error"
  }
}

CLI

oxlint --deny no-this-before-super

References

• Rule Source