Currying in Javascript It can be understood as function caching. Consider the snippet below:
// utils.js
const submitForm = (formName: string) => (submittedFormData) => {
const currentForm = getForm(formName);
return submit = () => {
validateForm(currentForm, submittedData)
callSubmitFormAPI(submittedFormData)
}
}
Firstly, we gonna get the form object from formName; Let's say if we have multiple formData waiting for submission (with diffrerent submittedFormData), we can use this function and not having to re-call the getForm function to get the same form:
import { submitForm } from 'utils';
const registerForm1Data = { ...someFormData1 };
const registerForm2Data = { ...someFormData2 };
// return the function `submit` function
const formSubmission = submitForm('REGISTER_FORM');
if (user === isSomeFlag) {
// can be seen as submitForm('REGISTER_FORM')(registerFormData1)
formSubmission(registerFormData1)
} else {
formSubmission(registerFormData2)
}
References:
Understand Currying - blogrocket;
Javascript Currying - javascript.info
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