How do i access Iframe #document with javascript

Question

I have this frame i cannot access,from initial inspection of the frame i noticed the frame contained a #document then i wrote a code to access the frame.

$body = document.body; $body.children[3]; $yo = $body.children[3]; $yo.children[0]; $next = $yo.children[0]; $next.children[3]; $plus = $next.children[3]; $plus.children[0]; $star = $plus.children[0]; $star.children[0]; $staragain = $star.children[0]; $staragain.children[1]; $nextstar = $staragain.children[1]; $nextstar.children[1]; $afternext = $nextstar.children[1]; $afternext.contentWindow;

The last line returns restricted,and
iframe.contentDocumentreturns null. Then i tried to access the frame document which is a #document withiframe.children[0]it returned undefined,then i left the array open but nothing happened.All codes i run on the frame returns undefined how do i access this frame #document?yoyoyo.

Emeeus · Accepted Answer · 2018-06-23 21:05:54Z

3

iframe.contentWindow.document but only if the origin is the same, because of Same-origin policy.

answered Jun 23, 2018 at 21:05

Emeeus

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13 Comments

Tobisky Over a year ago

How do i set the origin if the origin is not the same?

Emeeus Over a year ago

Unfortunately or fortunately we can't set the origin. If you need to access to document of other origin, there are two ways, perform an ajax GET/POST request only if server have Access-Control-Allow-Origin: yourDomine ( or *) developer.mozilla.org/es/docs/Web/HTTP/Headers/… OR perform a GET/POST from server side

Tobisky Over a year ago

i know how to configure an XHR but i don't know how to access the Access-Control-Allow-Origin header...

Emeeus Over a year ago

it's a server side header, if you don't control the server or this header is not present, the only way is perform a GET/POST from server side, not a browser. If you control the server it depends of the server code, but it's really easy.

Emeeus Over a year ago

Example in php: header('Access-Control-Allow-Origin: *');

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