使用解构将赋值分配给已定义的变量

Question

As per javascript.info, the below code should work, https://javascript.info/destructuring-assignment#object-destructuring

In my project, I already have some variables defined, now I am trying to assign a value using destructuring But, I am unable to run below code.

 // This also does not work. let title, width, height; myobj = {title: "Menu", width: 200, height: 100} ({title, width, height}) = myobj; console.log(title); 

 // This also does not work. let title, width, height; myobj = {title: "Menu", width: 200, height: 100} {title, width, height} = myobj; console.log(title); 

Answer 1

You need to wrap the entire expression in () and add a semicolon on the previous line

From Assignment without declaration

The parentheses ( ... ) around the assignment statement are required when using object literal destructuring assignment without a declaration.

Your ( ... ) expression needs to be preceded by a semicolon or it may be used to execute a function on the previous line.

 // This also does not work. let title, width, height; let myobj = { title: "Menu", width: 200, height: 100 }; // <- semicolon here ({ title, width, height } = myobj); console.log(title);