JSFiddle - React, Tailwind, and code Playground
JavaScript
object = {
key:["1","2","3","4","5"],
key2:["5","7","8","9"]
}
console.log(object);
delete object.key;
console.log(object);
object.key2 = $.grep(object.key2,function(x) { return x != "5"});
console.log(object);