Load iOS 'smart app banner' through JavaScript -


i'm having troubles ios smart app banner, i'm trying add through javascript.

the actual smartbanner simple adding little block head of html:

<meta name="apple-itunes-app" content="app-id=1008622954">

unfortunately, i'm quite restricted in way can upload script. can't change html directly, i'll through our tag manager, through javascript. turns out doesn't work.

i've tried simplify case testing:

  1. hardcoded tag in html: works (as expected)

    <meta name="apple-itunes-app" content="app-id=1008622954">

  2. inserted javascript directly when document ready: works

    $(document).ready(function(){     $("head").append('<meta name="apple-itunes-app" content="app-id=1008622954">'); });

  3. inserted javascript, after settimeout delay: does not work

    $(document).ready(function(){     settimeout(showbanner, 1);  //after 1 millisecond });  function showbanner(){     $("head").append('<meta name="apple-itunes-app" content="app-id=1008622954">'); }

can confirm or explain why delayed javascript doesn't work?

important: testing open page on actual ios device! desktop safari/chrome or ios emulator won't work. also, don't close banner, because won't show second time.

update:

i've added examples without jquery, plain 'ol javascript. results same. wait settimeout() smart app banner fails load.

  1. vanilla javascript - direct execution. works

    showbanner();  function showbanner() {     var meta = document.createelement("meta");     meta.name = "apple-itunes-app";     meta.content = "app-id=1008622954";     document.head.appendchild(meta); }

  2. vanilla javascript - delayed execution. does not work

    settimeout(showbanner, 1);  function showbanner() {     var meta = document.createelement("meta");     meta.name = "apple-itunes-app";     meta.content = "app-id=1008622954";     document.head.appendchild(meta); }

update 2:

the exact same unfortunate behavior can observed when loading script asynchronously

  1. async loading. does not work

    <script src="async.js" async></script>

    which calls same vanilla javascript direct execution showbanner();

    function showbanner() {     var meta = document.createelement("meta");     meta.name = "apple-itunes-app";     meta.content = "app-id=1008622954";     document.head.appendchild(meta); }

conclusion:

i can conclude ios safari looks smartbanner html in primary thread. , makes me sad :-(

only directly available html, or html added synchronously through javascript. no a-sync action allowed, loading javascript asynchronously, or using settimeout() (or other construct uses eval())

as of april 2017, smart banner show if added later via javascript.


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