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Object
Clone an object
const
clone
=
Object
.
assign
({},
original
);
Note: Doesn't do deep cloning. Use
lodash
or
underscore
Iterate keys in an object
(for...in)
const
object
=
{
x
:
'a'
,
y
:
'b'
,
z
:
'c'
}
for
(
const
key
in
object
)
{
console
.
log
(
`
${
key
}
:
${
object
[
key
]
}
`
);
}
Result:
x: a
y: b
z: c
​
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of
​
Iterate values in an object
(for...of)
Do not use `(for...of)` with `objects`. This will fatal with:
Safari:
TypeError: page[Symbol.iterator] is not a function. (In 'page[Symbol.iterator]()', 'page[Symbol.iterator]' is undefined)
Chrome:
Uncaught TypeError: page[Symbol.iterator] is not a function
​
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Clone an object
Iterate keys in an object (for...in)
Iterate values in an object (for...of)