How can i listen to a specific function call with parametters using javascript:
example : when showname(2) is called i can do something like call another function too, showage(2)
you can wrap it:
var native = window.alert;
window.alert = function(){
console.log('alerting...');
native.apply(window, arguments);
console.log('alerted!');
};
alert('test');
you can do something similar with properties, using getters and/or setters:
var foo = {
bar = 'baz'
};
into
var foo = {
_bar: 'baz',
get bar(){
console.log('someone is taking my bar!');
return this._bar;
},
set bar(val){
console.log('someone pretends to set my bar to ' + val + '!');
this._bar = val;
}
};
alert(foo.bar);
foo.bar = 'taz';
encapsulated (private _bar):
var foo = function(){
var _bar = 'baz';
return {
get bar(){
console.log('someone is taking my bar!');
return _bar;
},
set bar(val){
console.log('someone pretends to set my bar to ' + val + '!');
_bar = val;
}
};
}();
