I'm exploring Proxies in JavaScript, and I want to know if there are any ways to Proxy primitives. If I try to do so:
new Proxy('I am a string');
It throws Uncaught TypeError: `target` argument of Proxy must be an object, got the string "I am a string"
The reason I want to do this is to be able to proxy the primitive's prototype methods. I could edit the prototype, but editing every single prototype function of every single primitive does not sound viable.
You could work around it by wrapping the primitive value in an object:
const proxy = new Proxy({ value: 'I am a string' }, {
get(target, prop, receiver) {
const prim = Reflect.get(target, 'value');
const value = prim[prop];
return typeof value === 'function' ? value.bind(prim) : value;
}
});
proxy.endsWith('ing');
// => true
proxy.valueOf();
// => 'I am a string'
'test ' + proxy;
// => 'test I am a string'
proxy[0];
// => 'I'