Posting your HTML might help a bit. Instead, you can get the element first and then check if it is null or not and then ask for its value ... ... <看更多>

TypeError: document.getElementById(...) is null #455. Open. afdev82 opened this issue on May 2, 2019 · 0 comments. ... <看更多>

I am getting null value from Lightning component from document.getElementById().value below is the case. I am showing already existed record ... ... <看更多>

Check us out at https://www.skillforge.com The "cannot set property of null" error is a very common JavaScript ... ... <看更多>

At the top level there is a document object. From the document ... 1; var canvas = document.getElementById('the-canvas'); var context = canvas. ... <看更多>