The JavaScript function getSelection is malfunctioning, whereas getElementById is functioning perfectly

I am encountering a peculiar situation while trying to input text into a textbox using a JavaScript command. The CSS locator does not seem to update the text, whereas the ID locator is able to do so.

URL:

Below are screenshots of the browser console displaying results of both commands:

  1. With getSelection Image of getSelection JavaScript Command

  2. with getElementByID Image of getElementByID JavaScript Command

I also attempted to replicate this in Selenium, but encountered the same issue. getElementByID successfully inputs text into the field, while getSelection does not.

I would appreciate any insights on the possible reasons behind this behavior.

javascriptseleniumselenium-webdriver

Answer №1

document.querySelector is not the appropriate method for selecting nodes within an HTML page; rather, it is used to select specific elements on the page.

To achieve what you are trying to do, you should use window.document.getElementById. I tested it on a similar scenario and it worked perfectly.

window.document.getElementById("LastName").innerText = 'Smith';

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