JavaScript04, detailed explanation of array type, detailed explanation of object type, detailed explanation of branch and loop

Array type detailed







JavaScript tutorial
Important: 1. Create an array
2. push() pop() tail
3. 3. concat splicing

Detailed explanation of the object type. At the

end, adding a comma may not report an error. Some browsers will report an error, and the version is lower. The latest version has version compatibility issues.

All keys in JavaScript are strings, and values ​​are arbitrary objects!


Detailed explanation of branches and loops