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once does not preserve this context #2068
Description
es-toolkit version
1.51.0
Entry point
es-toolkit/compat
Reproduction
import { once as esToolkitOnce } from 'es-toolkit/compat';
import { once as lodashOnce } from 'lodash';
const esToolkitObject = {
value: 42,
getValue: esToolkitOnce(function (this: { value: number }) {
return this?.value;
}),
};
const lodashObject = {
value: 42,
getValue: lodashOnce(function (this: { value: number }) {
return this?.value;
}),
};
console.log(esToolkitObject.getValue()); // undefined
console.log(lodashObject.getValue()); // 42Current vs. expected behavior
The once function in es-toolkit/compat returns undefined because the wrapped function loses its this context.
For the same input, Lodash preserves the this context and returns 42.
I expect es-toolkit/compat to match Lodash's behavior and return 42.
Validations
- I searched the existing issues and discussions.
- I read the Contributing Guidelines.
- I wrote this description myself.
Activity