v-for & for...in vs for...of
for..in vs for...of
for (const key in object) {
if (Object.hasOwnProperty.call(object, key)) {
const element = object[key];
}
}
for (const iterator of object) {
}
demo
const arr = [
{name: 1},
{name: 2},
];
// for...of ✅ key in Object
for(let item of arr) {
console.log(`item = `, item);
}
// item = {name: 1}
// item = {name: 2}
// for...in ✅ key in Object
for(let item in arr) {
console.log(`item = `, item);
}
// item = 0
// item = 1
refs
https://developer.cdn.mozilla.net/en-US/docs/Web/JavaScript/Reference/Statements/for...of
https://developer.cdn.mozilla.net/en-US/docs/Web/JavaScript/Reference/Statements/for...in
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