JavaScript Sprawdź, czy obiekt jest pusty
function isObjectEmpty(obj) {
return Object.keys(obj).length === 0;
}
Grepper
function isObjectEmpty(obj) {
return Object.keys(obj).length === 0;
}function isEmptyObject(obj) {
return !Object.keys(obj).length;
}//when this.state.errors object is empty
if (Object.keys(this.state.errors).length == 0) {
this.props.updateUser(user);
this.props.navigation.goBack();
}const empty = {};
/* -------------------------
Plain JS for Newer Browser
----------------------------*/
Object.keys(empty).length === 0 && empty.constructor === Object
// true
/* -------------------------
Lodash for Older Browser
----------------------------*/
_.isEmpty(empty)
// trueconst emptyObject = {
}
// Using keys method of Object class
let isObjectEmpty = (object) => {
return Object.keys(object).length === 0;
}
console.log(isObjectEmpty(emptyObject)); // true
// Using stringify metod of JSON class
isObjectEmpty = (object) => {
return JSON.stringify(object) === "{}";
}
console.log(isObjectEmpty(emptyObject)); // true> !!Object.keys(obj).length;