Filling Input field using js

I'm trying to fill the hidden input field in hubspot form

<input name="last_visited_url_before_demo" class="hs-input" type="hidden" value="">

<input name="last_visited_url_before_demo" class="hs-input" type="hidden" value="">

tried using this code

document.addEventListener('DOMContentLoaded', function() {
    const inputField = document.querySelector('.hs_last_visited_url_before_demo input');
    const url = "theurl.com";
    inputField.value = url;
});

document.addEventListener('DOMContentLoaded', function() {
    const inputField = document.querySelector('.hs_last_visited_url_before_demo input');
    const url = "theurl.com";
    inputField.value = url;
});

Codepen: https://codepen.io/Abdul-Ahad-the-decoder/pen/KKYYyod?editors=1010 i'm not sure, what's going wrong here, can you please help

5 Replies

Jochem•3mo ago

the hsform is inserting an iframe and loading the form in that. document.querySelector can't go into that iframe you can try selecting the iframe using querySelector, then stepping in using, then using contentDocument instead but that only works in some circumstances depending on the iframe's site's crossorigin policy

Mannix•3mo ago

also DOMContentLoaded will run before the iframe is loaded if im not mistaken

Jochem•3mo ago

it unrelated to the iframe loading at the very least if there's a slow image and a fast iframe site, it might work, but it might also not the load event should wait to fire until the iframe is done loading. Won't solve this issue though

Abdul Ahad⚡•3mo ago

window.addEventListener('load', function() {
    const iframe = document.querySelector('iframe[src*="hubspot"]');
    if (iframe) {
        iframe.addEventListener('load', function() {
            const iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
            const inputField = iframeDocument.querySelector('.hs_last_visited_url_before_demo input');
            if (inputField) {
                const url = "theurl.com";
                inputField.value = url;
            }
        });
    }
});

window.addEventListener('load', function() {
    const iframe = document.querySelector('iframe[src*="hubspot"]');
    if (iframe) {
        iframe.addEventListener('load', function() {
            const iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
            const inputField = iframeDocument.querySelector('.hs_last_visited_url_before_demo input');
            if (inputField) {
                const url = "theurl.com";
                inputField.value = url;
            }
        });
    }
});

tried using contentDocument, still not able to get it, maybe due to the crossorigin policy then. any other way I can try?

Jochem•3mo ago

probably not, unless hsforms provides a way to send data into the form using the contructor thing in the html in your codepen

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Filling Input field using js