How to do function override in JavaScript ?
I have below code.
function helloWorld () {
return 'helloworld ';
}
var origHelloWorld = window.helloWorld;
window.helloWorld = function() {
return 'helloworld2';
}
alert(helloWorld);
I would like to get output like
helloworld helloworld2
What should I do ?
May be I described less. Actually I would like to call function the helloworld and I would like to get output of both functions jointly.
Try this:
function helloWorld () {
return 'helloworld ';
}
var origHelloWorld = window.helloWorld;
window.helloWorld = function() {
return origHelloWorld() + ' ' +'helloworld2';
}
alert( helloWorld() );
Are you sure, you understand override?
yours sample with the same parma, how to override it?
and javascript has not a method about the override, but you can override in other ways. you can follow other questions in stackoverflow
Using closures to avoid polluting the global namespace:
function helloWorld () {
return 'helloworld ';
}
helloWorld = (function() {
var original = window.helloWorld;
return function () {
return original() + ' helloworld2';
}})();
alert(helloWorld());
