I need help figuring out how to convert a string within an array into a class instance. The following code snippet is similar to what I'm working on:
var elements = ["({x: 0, y: 0, width: 100, height: 100})", "({x: 10, y: 10, width: 70, height: 70})"];
for(var i = 0; i < elements.length;i++) {
var objClass = new window[elements[i]];
console.log(objClass.width);
}
The syntax you provided in the variable classes doesn't match the requirements of the JSON Syntax, so using JSON.parse() is not a safe option.
Alternatively, you can use the eval() function which is native in JavaScript:
let classes = ["({x: 0, y: 0, width: 100, height: 100})", "({x: 10, y: 10, width: 70, height: 70})"],
objects = []
objects = classes.map((c)=> eval(c))
console.log(objects)Note: It is not recommended to use
eval()unless you have complete control over the origin of the string, as it could introduce vulnerabilities to your application.
JSON.parse() is a method that can transform a JSON string into an object. An example of this in action:
JSON.parse("{'width':100, 'height':200}")
This code will result in a JavaScript object being returned.
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