| | |
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| | | }) |
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| | | ``` |
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| | | |
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| | | You can also add the equivalent of a `beforeunload` event for [[SPA Routing]] via the `prenav` event. |
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| | | |
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| | | ```ts |
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| | | document.addEventListener("prenav", () => { |
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| | | // executed after an SPA navigation is triggered but |
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| | | // before the page is replaced |
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| | | // one usage pattern is to store things in sessionStorage |
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| | | // in the prenav and then conditionally load then in the consequent |
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| | | // nav |
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| | | }) |
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| | | ``` |
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| | | |
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| | | It is best practice to track any event handlers via `window.addCleanup` to prevent memory leaks. |
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| | | This will get called on page navigation. |
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| | | |
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