JavaScript | handler.get() Method

The handler.get() method in JavaScript is a trap for getting a property value.
Syntax:

const p = new Proxy(target, {
  get: function(target, property, receiver) {
  }
});

Parameters: This method accept three parameters as mentioned above and described below: 

• Target: This parameter holds the target object.
• Property: This parameter holds the name of the property which is to be get.
• Receiver: This parameter holds the proxy or an object that inherits from the proxy.

Return value: This method returns any value.
Below examples illustrate the handler.get() method in JavaScript:
Example 1:

javascript

<script>
const monster1 = {
  string: 'Geeksforgeeks',
  num: 334
};

const handler1 = {
  get: function(target, prop, receiver) {
    if (prop === 'string') {
      return `${target.string.substr(0, 8)} ... Best portal!`;
    } else {
      return Reflect.get(...arguments);
    }
  }
};

const proxy1 = new Proxy(monster1, handler1);

console.log(proxy1.num);
console.log(proxy1.string);
console.log(proxy1.numstring);

const obj = new Proxy({}, {
  get: function(target, property, receiver) {
    console.log('Property : ' + property);
    return 56.56;
  }
});

console.log(obj.value);
</script>

Output:

334
"Geeksfor ... Best portal!"
undefined
"Property : value"
56.56

Example 2:

javascript

<script>
const obj = {};
Object.defineProperty(obj, 'a', {
  configurable: false,
  enumerable: false,
  value: 10,
  writable: false
});

const p = new Proxy(obj, {
  get: function(target, property) {
    return 10;
  }
});

console.log(p.a);

var datalist = {
  "vala": 32, "valb": 7 }
var get = new Proxy(
  datalist,  {
    get: function(y, idx) {
         return y[idx] * 11
    }
  }
)

for(var z in get) {
  console.log(z +" : "+ get[z])
}
</script>

Output:

10
"vala : 352"
"valb : 77"

Supported Browsers: The browsers supported by handler.get() method are listed below: 

• Google Chrome 49 and above
• Edge 12 and above
• Firefox 18 and above
• Opera 36 and above
• Safari 10 and above