How could transform dropdown list values to a specif json format

I have a table a such

I’m getting the dropdown values using JavaScript as such :

let selectElementEnv = document.getElementById('env');
let optionNamesEnv = [...selectElementEnv.options].map(o => o.text);
console.log(optionNamesEnv );

Console output is

[ '100', '900']

To get the Depot values

let selectElementDepot = document.getElementById('Depot');
let optionNamesDepot = [...selectElementDepot.options].map(o => o.text);
console.log(optionNamesDepot );

Console output

[ 'AAA', 'AbA', 'AAA', 'AbA', 'ABC', '']   

To get the Articles values

let selectElementArticles = document.getElementById('Articles');
let optionNamesArticles = [...selectElementArticles .options].map(o => o.text);
console.log(optionNamesArticles );

Console output

[ 'Capacitor', 'Diode', 'mike', 'modem', '']   

How could i transform this outputs to get this json format ?

var myjson = [
{
"env": "100 ",
"depot": " AAA",
"articles": "Capacitor"
}, {
"env": "100 ",
"depot": "AbA",
"articles": "Diode"
}, {
"env": "100 ",
"depot": " AAA",
"articles": "cable"
},{
"env": "100 ",
"depot": "AbA",
"articles": "mike"
}, {
"env": "100 ",
"depot": "ABC",
"articles": "modem"
}, {
"env": "900",
"depot": "",
"articles": ""
}
 }];