What happens when the onload of the uniapp subpage is not executed?

In the process of using uniapp for development, sometimes the onload event of the subpage is not executed. This will not only affect the normal operation of the page, but also cause a waste of developer time and energy. So what is usually the cause of this problem? The following will analyze this problem from several aspects and propose corresponding solutions.

1. Possible reasons

1. Incorrect route jump
When using uniapp for development, each page is implemented through route jump. If the routing jump is incorrect, the onload event of the page will not be executed. For example: when jumping to a subpage, the routing path is written incorrectly, or redirect is used instead of navigateTo, etc.

2. Component life cycle issues
The life cycle of components is very important. If the life cycle of components is not used correctly, it will also cause the onload event of the subpage not to be executed. For example: when the component is rendered, the component's life cycle hook function is not called correctly.

3. Asynchronous request time
In the onload event of the sub-page, there may be an asynchronous request. If the asynchronous request takes too long, the onload event of the page will not be executed. For example: In the onload event of the subpage, an asynchronous request is made, but the request time is too long. The page has been loaded, but the data has not been returned.

2. Solution

1. Correct routing jump
To ensure that the onload event of the subpage can be executed normally, first ensure that the routing jump is correct. When performing route jumps, you should use the jump method according to the corresponding API. When configuring the routing table, you must also ensure that the path of each page is correct.

2. Correct use of component life cycle
The life cycle of components is very important. When we use components, we must use them in the order of the life cycle. Usually when we use components, we need to bind life cycle hook functions and call them at the appropriate time.

3. Reasonable asynchronous request time
In the onload function of the subpage, if an asynchronous request is made, please note that if the request time is too long, the onload event of the subpage may not be executed. Therefore, reasonable adjustments need to be made to the asynchronous request time. You can make requests asynchronously and set an appropriate timeout to avoid page freezes.

4. Try to use other life cycle functions
When the onload event of the subpage does not execute, you can try to add the code that needs to be executed in other life cycle functions. For example: add code that needs to be executed in life cycle functions such as onShow or onReady to ensure the normal operation of the page.

Summary

During the uniapp development process, if the onload event of a subpage is not executed, it will cause a lot of trouble to the developer. For this situation, we need to understand the possible causes and find appropriate solutions. This requires us to pay attention to details during the normal development process, master the life cycle of components, reasonably adjust the asynchronous request time, and ensure the correctness of routing jumps, so as to ensure the normal operation of the page and make our application more stable. and efficient.

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