eslint-plugin-no-redundant-assign

Prevent redundant assignment of the form:

var foo = bar;
return foo;

var foo;
// ...
foo = bar;
return foo;

npm i --save-dev eslint-plugin-no-redundant-assign

{
    "plugins": [
        "no-redundant-assign"
    ],
    "rules": {
        "no-redundant-assign/no-redundant-assign": 2
    }
}