JavaScript Handler get() Method
Last Updated :
22 May, 2023
JavaScript 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 accepts 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: In this example, we will set a trap to get the value of the object using the handler.get() method in JavaScript.
javascript
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);
|
Output:
334
"Geeksfor ... Best portal!"
undefined
"Property : value"
56.56
Example 2: In this example, we will set a trap to get the value of the object using the handler.get() method in JavaScript.
javascript
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);
let datalist = {
"vala": 32, "valb": 7
}
let get = new Proxy(
datalist, {
get: function (y, idx) {
return y[idx] * 11
}
}
)
for (let z in get) {
console.log(z + " : " + get[z])
}
|
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
We have a complete list of Javascript Proxy/handler methods, to check those go through the Javascript Proxy/handler Reference article.
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