jQuery Mobile: When to Use `$(document).ready()` vs. Page Events?
Dec 16, 2024 pm 12:50 PM
jQuery Mobile: $(document).ready() vs. Page Events
Understanding the Differences
In jQuery Mobile, page events are triggered during specific stages of page execution, addressing issues that can arise when using $(document).ready() for page manipulation.
Page Events
- pageinit: Triggered when a page is about to be loaded and shown for the first time. Only fires once per page.
- pagebeforeshow: Triggered before a page is transitioned to.
- pageshow: Triggered after a page has been transitioned to.
Benefits of Using Page Events
- Ensures that code executes only when a page is actually loaded, avoiding issues with Ajax page loading.
- Provides more control over code execution at specific points during page transitions.
Page Event Execution Order During Transitions
When transitioning from one page to another:
- Page B: pagebeforecreate
- Page B: pagecreate
- Page B: pageinit
- Page A: pagebeforehide
- Page A: pageremove
- Page A: pagehide
- Page B: pagebeforeshow
- Page B: pageshow
Sending Data Between Pages
To send data from one page to another:
- Use changePage() with dataUrl or data options.
- Retrieve data from the page URL using $(this).data("url").
Preventing Multiple Event Bindings
To prevent multiple event bindings on the same element:
- Use pageinit to bind events only once.
- Remove the event before rebinding it using .off().
- Use event filters to prevent event propagation.
Conclusion
Understanding the differences between $(document).ready() and page events in jQuery Mobile helps avoid potential issues and provides greater control over page manipulation and data handling during page transitions.
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