[Javascript] Conditionally spread entries to a JavaScript object
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In JavaScript, we often end up composing one object out of several other objects. Luckily there‘s a convenient spread operator which allows us to spread entries from one object to another.
Sometimes we only want to include something in the newly created object if a certain condition is met. In this lesson we are going to learn how to conditionally add entries to a JavaScript object using the spread operator.
const isAdmin = () => true;
const userData = {
name: "Tomasz",
surname: "?akomy"
};
// TODO:
// if user is an admin, add a is_admin: true
// to the object, otherwise don‘t add anythingconst userObject = {
id: 123,
...userData,
...(isAdmin() ? { is_admin: true } : {})
};
console.log(userObject);
原文：https://www.cnblogs.com/Answer1215/p/10277428.html
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