This works in Firefox, but watch out for Internet Explorer. Javascript based solutions such as Google Analytics are very popular, but will not show file downloads by default. This is because downloading a file does not cause any Javascript to be executed.
Subscribe Blog. Follow HttpWatch. Got Something to Say? The allow attribute in the iframe will override any Accept-CH header that widget. If you have specific parts of the user journey where you need a larger selection of hints than across the rest of the site, you may choose to request those hints on demand rather than statically across the entire site. This is more complex to manage, but if you already set different headers on a per route basis it may be feasible.
The important thing to remember here is that each instance of the Accept-CH header will effectively overwrite the existing set. So, if you are dynamically setting the header then each page must request the full set of hints required.
For example, you may have one section on your site where you want to provide icons and controls that match the user's operating system. There may be cases where you require more than the default set of hints on the very first request, however this is likely to be rare so make sure you've reviewed the reasoning.
The first request really means the very first top-level request for that origin sent in that browsing session.
The default set of hints includes the browser name with major version, the platform, and the mobile indicator. So the question to ask here is, do you require extended data on the initial page load? Also consider making use of the On-demand client-side JavaScript API strategy to alter content within the page as opposed to server-side. For additional hints on the first request there are two options. First, you can make use of the Critical-CH header.
This takes the same format as Accept-CH but tells the browser that it should immediately retry the request if the first one was sent without the critical hint. This will incur the overhead of the retry on the very first request, but the implementation cost is relatively low. Send the extra header and the browser will do the rest.
Accept-CH is all the values you would like for the page, Critical-CH is the subset of those values you must have or you cannot load the page properly. For situations where you require really do require additional hints on the very first page load, the Client Hints Reliability proposal is laying out a route to specify hints in the connection-level settings. This is still at a very early stage, but if you actively manage your own TLS and connection settings then this is an ideal time to contribute.
You may have legacy or third-party code on your site that depends on navigator. Long-term you should plan to move to the equivalent navigator. Warning : This is not recommended and not supported in any way. PDF is not character data. You want to use completely new request for this. This form is appended to the document and posted to the desired URL. Right after that the form is removed again:. This is how i solve this issue. The answer of Jonathan Amend on this post helped me a lot.
The example below is simplified. A simple event on button click. It creates an AjaxDownloadFile object. The AjaxDownloadFile class source is below. This worked for me.
0コメント