How to use the call () method of JavaScript
This article mainly explains "how to use the call () method of JavaScript". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the call () method of JavaScript.
The call () method is a predefined JavaScript method.
It can be used to call a method with the owner object as a parameter.
With call (), you can use methods that belong to another object.
This example calls the fullName method of person and is used for person1:
Example
Var person = {
FullName: function () {
Return this.firstName + "" + this.lastName
}
}
Var person1 = {
FirstName: "Bill"
LastName: "Gates"
}
Var person2 = {
FirstName: "Steve"
LastName: "Jobs"
}
Person.fullName.call (person1); / / will return "Bill Gates"
This example calls the fullName method of person and is used for person2:
Example
Var person = {
FullName: function () {
Return this.firstName + "" + this.lastName
}
}
Var person1 = {
FirstName: "John"
LastName: "Doe"
}
Var person2 = {
FirstName: "Mary"
LastName: "Doe"
}
Person.fullName.call (person2); / / will return "Steve Jobs"
Call () method with parameters
The call () method accepts parameters:
Example
Var person = {
FullName: function (city, country) {
Return this.firstName + "+ this.lastName +", "+ city +", "+ country"
}
}
Var person1 = {
FirstName: "Bill"
LastName: "Gates"
}
Person.fullName.call (person1, "Seattle", "USA").
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