hasPreviousPage( )
Indicates if there is a previous page of data.
Description
Returns true
if the current page is not the first
page in the dataset.
Returns false
if the current page is the first
page in the dataset.
Calling hasPreviousPage()
on a write-only dataset causes an error.
Note:
A dataset needs to load its data before you call its
hasPreviousPage()
function. Usually a dataset finishes loading a short time after the page it is on finishes loading. So if you callhasPreviousPage()
inside the page’sonReady()
event handler, the dataset might not be ready yet.To call
hasPreviousPage()
as soon as possible after a page loads, use the dataset'sonReady()
function inside the page’sonReady()
event handler to ensure that both the page and the dataset have finished loading.
Syntax
function hasPreviousPage(): boolean
hasPreviousPage Parameters
This function does not take any parameters.
Returns
true
if the current page is not the first page in the dataset.
Return Type:
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1let hasPreviousPage = $w("#myDataset").hasPreviousPage(); // true
1$w.onReady( () => {2 $w("#myDataset").onReady( () => {3 let hasPreviousPage = $w("#myDataset").hasPreviousPage(); // true45 } );67} );