get return value of last expression

Question

On the Chrome console, you can get the return value of the last expression

> 1+1; 2+1;
< 3

How to implement this function in javascript?

$expressions = '1+1; 2+1;' // from user input
new Function($expressions).call() // return 3, not 2

Can only be inserted in the last expression return statement?

The console is giving you the result of the last statement, which is the program result, and which is something you can't directly access in JS. — , Mar 03 '18 at 14:05

score 4 · Accepted Answer · answered Mar 03 '18 at 14:03

4

var value = eval("1+1; 2+1;");

console.log(value);

answered Mar 03 '18 at 14:03

Nisarg Shah

1

The OP is already evaluating the code with `Function`, so `eval` isn't really any worse. Main difference is that `eval` can access local variables. So `eval` isn't much worse than evaluating any other code, like with ` – Mar 03 '18 at 14:11

score 1 · Answer 2 · answered Mar 03 '18 at 14:05

1

Use eval(expression) instead like this:

console.log(eval("1+1; 1+2"));

answered Mar 03 '18 at 14:05

2 Answers2