How access all forms inside a ?</a></h1> </div> <div class="grid fw-wrap pb8 mb16 bb bc-black-075"> <div class="grid--cell ws-nowrap mr16 mb8" title="2016-01-12 19:07:53Z"> <span class="fc-light mr2">Asked</span> <time itemprop="dateCreated" datetime="2018-07-19T21:10:23.670" class="fromnow">Jul 19 '18 at 21:10</time> </div> <div class="grid--cell ws-nowrap mr16 mb8"> <span class="fc-light mr2">Active</span> <time class="fromnow" title="2018-07-19T21:18:45.900" datetime="2018-07-19T21:18:45.900">Jul 19 '18 at 21:18</a> </div> <div class="grid--cell ws-nowrap mb8" title="Viewed 127 times"> <span class="fc-light mr2">Viewed</span> 127 times </div> </div> <div id="mainbar" role="main" aria-label="questions and answers"> <div id="question" class="question" data-questionid="51431753" data-ownerid="" data-score="0"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container grid jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="51431753"> <button class="js-vote-up-btn grid--cell s-btn s-btnunset c-pointer"><svg aria-hidden="true" class="m0 svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 26h32L18 10 2 26z"></path></svg></button> <div class="js-vote-count grid--cell fc-black-500 fs-title grid fd-column ai-center" itemprop="upvoteCount" data-value="0">0</div> <button class="js-bookmark-btn s-btn s-btnunset c-pointer py4"> <svg aria-hidden="true" class="svg-icon iconBookmark" width="18" height="18" viewBox="0 0 18 18"><path d="M6 1a2 2 0 00-2 2v14l5-4 5 4V3a2 2 0 00-2-2H6zm3.9 3.83h2.9l-2.35 1.7.9 2.77L9 7.59l-2.35 1.7.9-2.76-2.35-1.7h2.9L9 2.06l.9 2.77z"></path></svg> <div class="js-bookmark-count mt4" data-value=""></div> </button> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"><p>I want access all elements inside of <code><form></code> of a webpage that load these forms inside a <code><frameset><iframe></code>, </p> <p><a class="external-link" href="https://i.stack.imgur.com/jG1zT.png" rel="nofollow noreferrer"><img alt="enter image description here" src="../../images/3824880778.webp"/></a></p> <p>then i have created this code below but not works.</p> <p>Already when is a page that not starts with a <code>iframe</code> works fine.</p> <p>How solve this?</p> <p><strong>manifest.json</strong></p> <pre><code>{ "name": "Chrome webrequest test", "version": "0.1", "description": "A test for webrequest", "manifest_version": 2, "permissions": [ "tabs", "background", "activeTab", "<all_urls>", "webNavigation", "webRequest", "webRequestBlocking", "http:///", "https:///", ":///*" ], "background": { "scripts": ["background.js"], "persistent": true }, "browser_action": { "default_icon": "img/flash128.png", "default_title": "Chrome webrequest" }, "icons" : { "48" : "img/flash48.png" } } </code></pre> <p><strong>background.js</strong></p> <pre><code>chrome.webRequest.onCompleted.addListener( function OnWebRequestCompleted() { chrome.tabs.executeScript(null, { file: "Inject.js" }, function() {}); }, { urls: ["<all_urls>"], types: ["main_frame"] }, ["responseHeaders"]); </code></pre> <p><strong>Inject.js</strong></p> <pre><code>var url = document.URL; if (url.indexOf("site.com") != -1) { var form = document.getElementsByTagName("form"); var btnclass = document.getElementsByClassName("btnClassName"); var inputField = document.getElementsByTagName('input'); for (var x = 0; x < form.length; x++) { // document.body.addEventListener('DOMSubtreeModified', function() { for (var i = 0; i < btnclass.length; i++) { btnclass[i].addEventListener('click', function(e) { for (var i = 0; i < inputField.length; i++) { alert(inputField[i].value); } }, false); } // }, false); } } </code></pre></div> <div class="mt24 mb12"> <div class="post-taglist grid gs4 gsy fd-column"> <div class="grid ps-relative"> <a href="../../questions/tagged/javascript" class="post-tag js-gps-track" title="show questions tagged 'javascript'" rel="tag">javascript</a> <a href="../../questions/tagged/google-chrome" class="post-tag js-gps-track" title="show questions tagged 'google-chrome'" rel="tag">google-chrome</a> <a href="../../questions/tagged/google-chrome-extension" class="post-tag js-gps-track" title="show questions tagged 'google-chrome-extension'" rel="tag">google-chrome-extension</a> </div> </div> </div> <div class="mb0"> <div class="mt16 grid gs8 gsy fw-wrap jc-end ai-start pt4 mb16"> <div class="grid--cell mr16 fl1 w96"></div> <div class="post-signature grid--cell"> <div class="user-info "> <div class="user-action-time">edited <span title="2018-07-19T21:15:29.990" class="relativetime">Jul 19 '18 at 21:15</span></div> <div class="user-gravatar32"></div> <div class="user-details" itemprop="author" itemscope="" itemtype="http://schema.org/Person"> <span class="d-none" itemprop="name"></span> <div class="-flair"></div> </div> </div> </div> <div class="post-signature owner grid--cell"> <div class="s-user-card s-user-carddeleted"> <time class="s-user-card--time" datetime="asked Jul 19 '18 at 21:10">asked Jul 19 '18 at 21:10</time> <div class="s-avatar s-avatar32 s-user-card--avatar"> </div> <div class="s-user-card--info"></div> </div> </div> </div> </div> </div> <div class="post-layout--right js-post-comments-component"> </div> </div> </div> <div id="answers"> <a name="tab-top"></a> <div id="answers-header"> <div class="answers-subheader grid ai-center mb8"> <div class="grid--cell fl1"> <h2 class="mb0" data-answercount="9">1 Answers<span style="display:none;" itemprop="answerCount">1</span></h2> </div> </div> </div> <a name="51431870"></a> <div id="answer-51431870" class="answer accepted-answer" data-answerid="51431870" data-ownerid="8184112" data-score="0" itemprop="acceptedAnswer" itemscope="" itemtype="https://schema.org/Answer"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container grid jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="51431870"> <button class="js-vote-up-btn grid--cell s-btn s-btnunset c-pointer"><svg aria-hidden="true" class="m0 svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 26h32L18 10 2 26z"></path></svg></button> <div class="js-vote-count grid--cell fc-black-500 fs-title grid fd-column ai-center" itemprop="upvoteCount" data-value="0">0</div> <div class="js-accepted-answer-indicator grid--cell fc-green-500 py6 mtn8"><div class="ta-center"><svg aria-hidden="true" class="svg-icon iconCheckmarkLg" width="36" height="36" viewBox="0 0 36 36"><path d="m6 14 8 8L30 6v8L14 30l-8-8v-8z"></path></svg></div></div> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"><p>Your iframe is a different document. Where you currently use <code>document.getElementsBy</code> you will need to change to something like</p> <pre><code>var iframe = document.getElementById('frameID'); var innerDoc = iframe.contentDocument innerDoc.getElementsBy... </code></pre></div> <div class="mb0"> <div class="mt16 grid gs8 gsy fw-wrap jc-end ai-start pt4 mb16"> <div class="grid--cell mr16 fl1 w96"></div> <div class="post-signature grid--cell"> <div class="s-user-card s-user-card"> <time class="s-user-card--time" datetime="answered Jul 19 '18 at 21:18">answered Jul 19 '18 at 21:18</time> <a href="../../users/8184112/daniel" class="s-avatar s-avatar32 s-user-card--avatar"> <img class="s-avatar--image" src="../../users/profiles/8184112.webp" data-jdenticon-width="32" data-jdenticon-height="32" data-jdenticon-value="Daniel" /> </a> <div class="s-user-card--info"> <a href="../../users/8184112/daniel" class="s-user-card--link">Daniel</a> <ul class="s-user-card--awards"> <li class="s-user-card--rep" title="reputation score">3,312</li> <li class="s-award-bling s-award-blinggold" title="1 gold badge">1</li> <li class="s-award-bling s-award-blingsilver" title="14 silver badge">14</li> <li class="s-award-bling s-award-bling__bronze" title="31 bronze badge">31</li> </ul> </div> </div> </div> </div> </div> </div> <div class="post-layout--right js-post-comments-component"> </div> </div> </div> </div> </div> </div> </div> <script src="../../static/js/stack-icons.js"></script> <script src="../../static/js/fromnow.js"></script> </body> </html>