Detailed explanation of js basic built-in objects
Almost everything in js can be called an object, including values, strings, dates, arrays, functions, etc. In this article, we mainly share with you the basic knowledge of js built-in objects, hoping to help everyone.
The following is a summary of some built-in objects:
1. To declare an object, you can use the new keyword
such as:
1 2 |
|
2. To access an object, use the following form:
1 |
|
3. Access object properties:
1 |
|
1. Date object (Date())
Define a date object
1 |
|
Date( ) objects commonly used methods for processing dates and times are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
2. Array object (Array())
Define an array object
1 |
|
Array() object is commonly used The methods are:
1 2 3 4 5 6 7 8 9 10 11 |
|
3. String (String())
Define string object:
1 |
|
Commonly used methods of string object:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
IV , Math()
Commonly used methods of Math() objects are:
1 |
|
5. Global()
Commonly used methods of Global objects are:
1 2 3 4 5 6 |
|
6. Regular expressions
Commonly used methods:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
|
1 |
|
1. To declare and define an object, you can use the new keyword
such as:
1 2 |
|
2. To access an object, use the following Form:
1 |
|
3. Access object attributes:
1 |
|
1. Date object (Date())
Define a date object
1 |
|
Date() objects commonly used methods for processing dates and times are:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
2. Array object (Array())
Define an array object
1 |
|
Array( ) Commonly used methods of objects are:
1 2 3 4 5 6 7 8 9 10 11 |
|
3. String (String())
Define string objects:
1 |
|
Commonly used methods of string objects:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
4. Math()
The commonly used methods of Math() objects are:
1 |
|
5. Global()
The commonly used methods of Global objects are:
1 2 3 4 5 6 |
|
6. Regular expression
Commonly used methods:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
|
Related recommendations:
JavaScript core reference tutorial built-in objects_js object-oriented
JavaScript study notes built-in objects_basic knowledge
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