Destruct and assign in javascript/typescript [duplicate]

Question

I have the following code

const myVariable: number | undefined;

if (someCondition) {
     const { someAttribute, anotherAttribute } = someFunction(); //here I want to assign directly that myVariable to someAttribute. 
     doAnotherTask(anotherAttribute);
  
}

doSomethingWithVariable(myVariable);

How can I destruct someFunction to get someAttribute and directly assign myVariable to it.

const {someAttribute: myVariable} wouldnt work here, since myVariable is defined outside the scope of the condition.

Answer 1

Just drop the const, since you're not creating a new variable. And myVariable can't be a const since you need to assign a value to it later.

Due to how the JavaScript language works, you also need parentheses around the destructuring statement.

let myVariable: number | undefined;

if (someCondition) {
     ({ someAttribute: myVariable } = someFunction());
}

doSomethingWithVariable(myVariable);