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javascript

How to convert string to boolean value?

Is it possible to convert/wrap an array value into a if statement? For clarification, the statement I received from my code is always a string in an array, and I want to execute it in an if block. Right now, it does not do a comparison because it is a string. So how can I convert a string into a statement that will be compared?

let counter = 11;
let statement = ['counter > 10']; // array string received from other code (always a string)

if(statement[0]) {
    // should be true
}

Result expected to be true, where the if statement is dynamically executed.

EDIT: I found an answer by Using Function:

Execute JavaScript code stored as a string

Solution

  • Other answers and comments has mentioned

    • eval - obviously the most dangerous
    • new Function - easy to pollute global scope
    • mathematics parsers - good for simple expression

    If you really want to execute any code, isolated-vm may help. (only in Node.js)

    Also, when using isolated-vm, restricting the permission of the process is a must.