Why is this an issue?
When merging objects or copying properties from one object to another, use object spread syntax instead of Object.assign(). Object
spread syntax was introduced in ES2018 and allows shallow-cloning or merging of objects with a more concise and readable syntax.
The Object.assign() also allows to mutate an object, which is not possible with the spread syntax, so the rule only applies to cases
where the first argument of the Object.assign() is an object literal.
const a = Object.assign({}, foo); // Noncompliant: Use spread syntax to clone or merge objects
const b = Object.assign({}, foo, bar); // Noncompliant: Use spread syntax to clone or merge objects
const c = Object.assign({foo: 123}, bar); // Noncompliant: Use spread syntax to clone or merge objects
const d = Object.assign({}); // Noncompliant: Use spread syntax to clone or merge objects
To fix the code replace Object.assign() with a spread syntax.
const a = {...foo};
const b = {...foo, ...bar};
const c = {foo: 123, ...bar};
const d = {};
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