no-class-assign

You can assign to a class declaration's name like a let variable. After that the class is gone, and every new Logger() and instanceof Logger in the file works with the new value. That's almost always a mistake.

This rule is on by default in JavaScript files. It's off in TypeScript files, where TypeScript reports the same mistake.

Configure

On by default as an error. To turn it off:

[lint.rules]
"no-class-assign" = "off" # or "warn"

Examples

Reported:

class Logger {}

Logger = createLogger();

Not reported:

class Logger {}

const logger = createLogger();

A variable that holds a class expression is an ordinary variable:

let Store = class {};

Store = class extends Store {};