Small program -- subcontracting

1. What is subcontracting

Subcontracting refers to dividing a complete applet project into different according to requirementsSubpackages, which are packaged into different subpackages during construction, and users can load on demand

when they use them.

2. The benefits of subcontracting

• You can optimize the download time for the first launch of the applet
• Better decoupling and collaboration

3. Composition of the project before subcontracting

Before subcontracting, all pages and resources in the applet project arePackaged together, resulting in the entire project is too large, affecting the download time of the applet first startup

4. The composition of the project after subcontracting

After subcontracting, it mainly consists of 1 main package + multiple subcontracts:

• Generally only contains the startup page or TabBar page of the project, and all subcontractsSome public resources
needed
• Subpackage: Only include pages and private resources related to the current subpackage

5. Subpackage loading rules

When the applet starts, by default it will download the main package and start the page in the main packagespan>

The tabBar page needs to be placed in the main package

When the user enters a page in the subpackage, client will download the corresponding subpackage, and display it after the download is complete

Non-tabBar pages can be divided into different subpackages according to different functions, and then downloaded on demand

6. The volume limit of subcontracting

Currently, there are two restrictions on the size of sub-packages of Mini Programs:

• The size of all sub-packages of this applet project does not exceed 16M (main package + all sub-packages)
• Single subpackage/main package size cannot exceed 2M

7. Use subcontracting

 "subpackages": [{"root": "packageA","name": "p1",//Name the package"pages": ["pages/cat","pages/dog"]},{"root": "packageB","name": "p2","pages": ["pages/apple","pages/banana"]}],

8. How to check the volume of the package

9. Packaging principles

• The applet will be subpackaged according to the configuration of subpackages, and the directories other than subpackages will be packagedinto the main package
• The main package can also have its own pages (ie the outermost pages field)
• tabBar page must be in main package
• Subpackages cannot be nested with each other

10. Citation principles

• Main packageCannot referenceprivate resources in subpackages
• cannot refer to each other between subcontractsprivate resources
• Subcontractingcan referencepublic resources in the main package