Javascript objects creation method

Question

I have created an object named computer but it is giving me the error Uncaught SyntaxError: Invalid shorthand property initializer and Uncaught ReferenceError: computer is not defined

What I can be done where I am going wrong? Please help.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script type="text/javascript">
        computer = {drive: "floppy", cpu = "intel", ram: "ddr"}
    </script>
</head>
<body>
<script type="text/javascript">
    document.write(computer.drive);
</script>

</body>
</html>

const computer = {drive: "floppy", cpu = "intel", ram: "ddr"} — Bergur
– Bergur, Commented Apr 21, 2020 at 12:38
you can also use let or var – let computer = {drive ... if you intend to make a change to the variable later on — Djave
– Djave, Commented Apr 21, 2020 at 12:39
You also have cpu = "intel" which should be cpu: "intel" – that is the invalid shorthand — Djave
– Djave, Commented Apr 21, 2020 at 12:40

Akshay Bande · Accepted Answer · 2020-04-21 12:39:27Z

0

You forgot to declare it.

    const computer = {drive: "floppy", cpu: "intel", ram: "ddr"}

edited Apr 21, 2020 at 12:39

answered Apr 21, 2020 at 12:38

Akshay Bande

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Comments

Djave · Accepted Answer · 2020-04-21 12:50:35Z

You have two errors:

Invalid shorthand property initializer
Uncaught ReferenceError: computer is not defined

These sound scary but they are both quite straight forward to fix.

Invalid shorthand property initializer

{drive: "floppy", cpu = "intel", ram: "ddr"}
                      ^

This = should be a : like the other bits of your object. If you'd have Googled this on its own you would have been able to fix it yourself. The shorthand syntax is something else you can use, so if you wrote something like:

var cpu = "intel";
var computer = {drive: "floppy", cpu, ram: "ddr"}

That would be an example of valid shorthand, and is the same as writing

var cpu = "intel";
var computer = {drive: "floppy", cpu: cpu, ram: "ddr"}

Uncaught ReferenceError: computer is not defined

When we write var or let or const we are declaring variables. In your case, you just write:

computer = { ...

The error is telling you quite clearly that you haven't defined a variable called that, or it can't find one. This is a simple fix:

var computer = {

As a sidenote, notice that above when declaring a variable it is correct to use an equals sign, but when you are in an {} object, you should always use colons.

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