The updates of imported bindings by ES Modules cause runtime errors.
This rule warns the assignments, increments, and decrements of imported bindings.
Examples of incorrect code for this rule:
/*eslint no-import-assign: "error"*/
import mod, { named } from "./mod.mjs"
import * as mod_ns from "./mod.mjs"
mod = 1 // ERROR: 'mod' is readonly.
named = 2 // ERROR: 'named' is readonly.
mod_ns.named = 3 // ERROR: the members of 'mod_ns' is readonly.
mod_ns = {} // ERROR: 'mod_ns' is readonly.
Examples of correct code for this rule:
/*eslint no-import-assign: "error"*/
import mod, { named } from "./mod.mjs"
import * as mod_ns from "./mod.mjs"
mod.prop = 1
named.prop = 2
mod_ns.named.prop = 3
// Known Limitation
function test(obj) {
obj.named = 4 // Not errored because 'obj' is not namespace objects.
}
test(mod_ns) // Not errored because it doesn't know that 'test' updates the member of the argument.
If you don't want to be notified about modifying imported bindings, you can disable this rule.