Sometimes, we want to fix ‘observe’ on ‘MutationObserver’: parameter 1 is not of type ‘Node’ with JavaScript.
In this article, we’ll look at how to fix ‘observe’ on ‘MutationObserver’: parameter 1 is not of type ‘Node’ with JavaScript.
How to fix ‘observe’ on ‘MutationObserver’: parameter 1 is not of type ‘Node’ with JavaScript?
To fix ‘observe’ on ‘MutationObserver’: parameter 1 is not of type ‘Node’ with JavaScript, we should make sure the element we’re observing is available.
For instance, we write
const composeObserver = new MutationObserver(function (mutations) {
mutations.forEach((mutation) => {
mutation.addedNodes.forEach((node) => {
//...
});
});
});
const composeBox = document.querySelector(".no");
if (composeBox) {
const config = { childList: true };
composeObserver.observe(composeBox, config);
}
to select the element to observer with querySelector.
Then if it’s not null, we call observe to observer the changes in the element.
Conclusion
To fix ‘observe’ on ‘MutationObserver’: parameter 1 is not of type ‘Node’ with JavaScript, we should make sure the element we’re observing is available.
