javascript运算符
JavaScript删除运算符 (JavaScript delete Operator)
"delete" is an operator in JavaScript and it is used to delete a property of an object. After deleting the particular property, that property will not be accessible and returns "undefined".
“删除”是JavaScript中的运算符，用于删除对象的属性。 删除特定属性后，该属性将不可访问并返回“ undefined” 。
Syntax:
句法：
delete property;
Example:
例：
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var employee = {
name: "Amit shukla",
age: 21,
city: "Gwalior",
Country: "India"
};
//printing the object
document.write("Printing employee details...<br>");
document.write("Name: " + employee.name + "<br/>");
document.write("Age: " + employee.age + "<br/>");
document.write("City: " + employee.city + "<br/>");
document.write("Country: " + employee.Country + "<br/>");
document.write("<br>");
//deleting properties age & city
delete employee.age;
delete employee.city;
document.write("Printing employee details after delete...<br>");
document.write("Name: " + employee.name + "<br/>");
document.write("Age: " + employee.age + "<br/>");
document.write("City: " + employee.city + "<br/>");
document.write("Country: " + employee.Country + "<br/>");
</script>
</body>
</html>
Output
输出量
Printing employee details...
Name: Amit shukla
Age: 21
City: Gwalior
Country: India
Printing employee details after delete...
Name: Amit shukla
Age: undefined
City: undefined
Country: India
翻译自: https://www.includehelp.com/code-snippets/delete-operator-with-example-in-javascript.aspx
javascript运算符
