Javascript variable object keys [duplicate]

Question

This question already has answers here:

How to use a variable for a key in a JavaScript object literal? (16 answers)

Closed 11 years ago.

I am attempting to add a variable key, with no luck.

Here's what I got so far:

mysql('translations',{
 check: 'element_id',
 element_id: element_id,
 {'lang-'+lang_id}: value
});

The variable key is the last line of the function.

Any ideas?

Answer 1

You can't use expressions for the identifiers in an object literal.

First create the object, then you can use dynamic names:

var obj = {
 check: 'element_id',
 element_id: element_id,
}
obj['lang-'+lang_id] = value;
mysql('translations', obj);

• Ilya Karnaukhov: Yes I was thinking of doing something like this. Thank you!

Answer 2

You can do this:

var x = {
 check: 'element_id',
 element_id: element_id 
};
x['lang-'+lang_id] = value;
mysql('translations', x);