Safari extension, open new tab with HTML page, pass parameters

Question

In my extension I want to open a new tab when a toolbar button is clicked (works), display a static HTML page with JavaScript on the tab (works) and pass data (URL from the originating page) to the new tab (does not work). I tried:

• Using query parameters like myTab.url = safari.extension.baseURI + 'page.html?' + params, but the target page does not seem to have a location assigned (location.search giving no result).

• myTab.page.dispatchMessage("url", "someUrl"); after opening the tab, but the message never arrives in the new tab (I suspect, it's already "through", when the tab has opened).

Any suggestions?

Answer 1

I parsed document.URL in opened page for specific parameter and it worked for me. E.g.

function __onLoad()
{
    var p = $.url(document.URL);
    alert(p.param("url"));
}

And two possible reasons for missed message:

• You did not add message event listener on your page
• You called dispatchMessage before event listener was added

Check Safari development doc at https://developer.apple.com/library/archive/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html