Why does querySelector return null?
The Document method querySelector() returns the first Element within the document that matches the specified selector, or group of selectors. If no matches are found, null is returned.
What is the difference between querySelector () and querySelectorAll ()?
Differences: As seen above, querySelector() methodcan only be used to access a single element while querySelectorAll() method can be used to access all elements which match with a specified CSS selector. To return all matches, querySelectorAll has to be used, while to return a single match, querySelector is used.
Why does document.queryselector always return null?
For some reason this line of code always returns null. I checked the value of document in the console so I’m pretty sure that’s correct. The id is buried deep inside a table though, could that be an issue?
What does document.queryselector return in DOM Inspector?
Actually, document.querySelector also does not return anything. However, opening DOM inspector fixes the issue. Not sure if this is the same issue as #1631. Elements can be found consistently. Unfortunately, I cannot provide a failing example.
When to use document.queryselector in JavaScript?
The contents are loaded first and your java script should work fine after that. IDs are handled specially in CSS selector syntax, with a # followed by the ID, so you’d normally want something like document.querySelector (‘#MTG_INSTR$2’), but $ isn’t a legal ID component, so ideally you’d give it a better name. Other approaches are:
Why does puppeteer queryselector always return null?
I am trying to scrap some data with puppeteer but for some sites querySelector returns null and I have no idea what is wrong. I found some answers about this issue in stackoverflow but none of them worked. Here is the code with an example link that does not work.