How to execute a valid code string in JavaScript?

#javascript

To execute a code string, you can use the eval() global function in JavaScript.

Consider a string which itself is a valid piece of JavaScript code like this,

// javascript code as string
const codeStr = `
if(12 > 10){
    console.log('12 is greater')
}`;

As you can see the above string is an actual valid piece of if statement in JavaScript.

To run this string, let's use the global eval() function in JavaScript.

// javascript code as string
const codeStr = `
if(12 > 10){
    console.log('12 is greater')
}`;

// run string using eval() function
eval(codeStr); // 12 is greater

The code string will be executed using the eval() function.
This is useful when having an application of some kind where you can receive the JavaScript code as the string and then needs to be executed.
This can also make serious problems to the application if you are not careful enough using the eval() function and it is not at all recommended t use it in a real-life application. ✨

See this example live in JSBin.