Sometimes, we want to fix Uncaught TypeError: Cannot read property ‘value’ of undefined with JavaScript.
In this article, we’ll look at how to fix Uncaught TypeError: Cannot read property ‘value’ of undefined with JavaScript.
How to fix Uncaught TypeError: Cannot read property ‘value’ of undefined with JavaScript?
To fix Uncaught TypeError: Cannot read property ‘value’ of undefined with JavaScript, we should make sure we get the value property of an element.
For instance, we write
const el1 = document.getElementsByName("username")[0];
const el2 = document.getElementById("i1");
to get the first element with name attribute set to username with document.getElementsByName("username")[0].
And we get the element with ID i1 with document.getElementById("i1").
Conclusion
To fix Uncaught TypeError: Cannot read property ‘value’ of undefined with JavaScript, we should make sure we get the value property of an element.
