How to find out the caller function in JavaScript?
Last Updated :
26 Dec, 2022
In this article, we see the methods to find out the caller function in Javascript. Sometimes, the developer may want to modify how a function works on the basis of its caller function. To find out the caller function name, we will use the Function object’s caller property.
Property:
Here, the Function object is replaced by the name of the function of which we want to know the parent function name.
Example 1: When the below code is executed, we can see the name of the parent function being logged out.
javascript
<script>
function Foo() {
console.log(Foo.caller.name);
}
function Bar() {
Foo();
}
Bar();
</script>
|
Output:
Bar
Example 2: Suppose we call the Foo function from multiple functions.
javascript
<script>
function Foo() {
console.log(Foo.caller.name);
}
function Geeks() {
Foo();
}
function Fun() {
Foo();
}
function Sam() {
Foo();
}
Geeks();
Fun();
Sam();
</script>
|
Output:
Geeks
Fun
Sam
You can know more about the parent function from the property Function.caller
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