Specify scope for eval() in JavaScript?

Question

is there any way I can execute eval() on a specific scope (but NOT global)?

for example, the following code doesn\'t work (a is undefined on the sec

Answer 1

The poor man's method:

If your scope is not too dynamic, just a couple of static and read-only declarations, simply put it in a string and concatenate with the string what you wanna execute like this:

  const scopeAll = `
    const myFunc = (a, b) => a + b + s; 
  `

  const scope1  = `
    ${scopeAll}
    const s = 'c';
  `
  const scope2  = `
    ${scopeAll}
    const s = 'd';
  `
  
  const myStringToExecute = `
    myFunc('a', 'b')
  `
  
  
  console.log(eval(scope1 + myStringToExecute));
  console.log(eval(scope2 + myStringToExecute));