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I have a problem regarding filling out an input field with JavaScript.

The reson i try using javascript for this, is i want my flutter android app to open the website as an webview and fill out the input fields.

For testing i run my javascript code in chrome as a script snippet.

I am trying to fill out the input fields of this Webseite : https://topup.klarna.com/stw_dusseldorf, but if i use document.getElementById("cs-card-number").value = "12345"; the change goes away if i interact with the website;

I tried triggering the input Event, but it did not work either.

I even tried recreating the same input event as it would be triggered if i manuly typ something in

var event = new InputEvent('input');
 event.value = "1";
//event.isTrusted = true
//Object.defineProperty(event, 'isTrusted', {writable: false, value: true});
Object.defineProperty(event, 'bubbles', {writable: false, value: true});
Object.defineProperty(event, 'cancelBubble', {writable: false, value: false});
Object.defineProperty(event, 'cancelable', {writable: false, value: false});
Object.defineProperty(event, 'composed', {writable: false, value: true});
Object.defineProperty(event, 'currentTarget', {writable: false, value: document});
Object.defineProperty(event, 'data', {writable: false, value: "1"});
Object.defineProperty(event, 'dataTransfer', {writable: false, value: null});
Object.defineProperty(event, 'defaultPrevented', {writable: false, value: false});
Object.defineProperty(event, 'detail', {writable: false, value: 0});
Object.defineProperty(event, 'eventPhase', {writable: false, value: 3});
Object.defineProperty(event, 'inputType', {writable: false, value: "insertText"});
Object.defineProperty(event, 'isComposing', {writable: false, value: false});
Object.defineProperty(event, 'path', {writable: false, value: [$("input#cs-card-number-confirm"), $("div#cs-card-number-confirm__text-wrapper"), $("div#cs-card-number-confirm__container"), $("label"), $("div#cs-card-number-confirm__root"), $("div"), $("div.sc-keyyzf.glhkcc"), $("div.sc-fjdhpx.huktqi"), $("div.sc-iwskbi.hwpiky"), $("div.sc-brqgnp.doeca"), $("div.sc-jwbwvp.efkmfx"), $("div#root"), $("body"), $("html"), document, Window]});
Object.defineProperty(event, 'returnValue', {writable: false, value: true});
Object.defineProperty(event, 'sourceCapabilities', {writable: false, value: null});
Object.defineProperty(event, 'srcElement', {writable: false, value: ele});
Object.defineProperty(event, 'target', {writable: false, value: ele});
event.type= "input"

document.dispatchEvent(event);

Also have tried using

document.getElementById("cs-card-number").setAttribute("value", "1234");

I am out of ideas how to do this. If somebody knew how to do this, it would be a great help.

Improve this question
6
  • did you try set attribute? : document.getElementById('test').setAttribute('value', test); Commented Jan 21, 2022 at 17:11
  • yes have tried that too Commented Jan 21, 2022 at 17:24
  • Have you checked the browser console for errors? What exactly does "interact with the website" mean? Commented Jan 21, 2022 at 17:26
  • yea checked the console no errors. With interact i mean hovering with the mouse over the input fields. Commented Jan 21, 2022 at 17:30
  • 1
    Thank you the answer stackoverflow.com/a/66329563/17995477 from you suggestion Question worked. Thank you Commented Jan 21, 2022 at 18:21
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