Fill in the administrator list code User/index. The administrator interface cannot be displayed, and the browser prompts element is not defined.

Question

The detailed error message is below. What should the teacher do?

xadmin.js:13 Uncaught ReferenceError: element is not defined at Object.tabAdd (xadmin.js:13:11)

Answer 1

This is an error reported by the js used. Find your corresponding 13 lines in your js file. It should be that the corresponding element is not obtained, resulting in an error when used.

is your html page There is a problem, which causes the js code to not be able to obtain the element

2. The variable scope defined in js causes the element to not be obtained