How to use the JavaScript accessor
In this article, the editor introduces in detail "how to use the JavaScript accessor". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to use the JavaScript accessor" can help you solve your doubts.
JavaScript accessor (Getter and Setter)
Why use Getter and Setter?
It provides a more concise syntax
It allows the syntax of properties and methods to be the same
It ensures better data quality.
It is good for backstage work
JavaScript Getter (get keyword)
This example uses the lang property to get the value of the language property.
Example
/ / create an object:
Var person = {
FirstName: "Bill"
LastName: "Gates"
Language: "en"
Get lang () {
Return this.language
}
}
/ / use getter to display data from objects:
Document.getElementById ("demo"). InnerHTML = person.lang
JavaScript Setter (set keyword)
This example uses the lang property to set the value of the language property.
Example
Var person = {
FirstName: "Bill"
LastName: "Gates"
Language: ""
Set lang (lang) {
This.language = lang
}
}
/ / use setter to set object properties:
Person.lang = "en"
/ / display the data from the object:
Document.getElementById ("demo"). InnerHTML = person.language
JavaScript function or Getter?
What is the difference between the following two examples?
Example 1
Var person = {
FirstName: "Bill"
LastName: "Gates"
FullName: function () {
Return this.firstName + "" + this.lastName
}
}
/ / use methods to display data from objects:
Document.getElementById ("demo"). InnerHTML = person.fullName ()
Example 2
Var person = {
FirstName: "Bill"
LastName: "Gates"
Get fullName () {
Return this.firstName + "" + this.lastName
}
}
/ / use getter to display data from objects:
Document.getElementById ("demo"). InnerHTML = person.fullName
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