eval() js code example
Example 1: Calculate string value in javascript, not using eval
let str = "12/5*9+9.4*2"
let res1 = eval(str)
console.log('res1:', res1)
let res2 = (new Function('return '+str)())
console.log('res2:', res2)
Example 2: what is eval in js
The eval() function evaluates JavaScript code represented as a string.
console.log(eval('2 + 2'));
console.log(eval(new String('2 + 2')));
console.log(eval('2 + 2') === eval('4'));
console.log(eval('2 + 2') === eval(new String('2 + 2')));
Example 3: eval javascript
eval(string)