eslint/no-this-before-super Correctness

✅ This rule is turned on by default.

What it does

Requires calling super() before using this or super.

This rule can be disabled for TypeScript code, as the TypeScript compiler enforces this check.

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