Found that the textarea in html cannot get focus! _html/css_WEB-ITnose

HTML Bootstrap dialog box

The process is like this, I used the modal dialog box in the bootstrap framework! . . In this simulation dialog box, I have a button that calls another modal dialog box, and there is a textarea in the second modal dialog box, but I don’t know why this textarea can’t get focus and changes it to This text box cannot get focus either!
What’s even weirder is that if you close the second dialog box and then open it again, the textarea/text box can actually gain focus again!

It’s probably a focus issue! Can anyone help me solve this problem? Kneel down and thank you!

Reply to the discussion (solution)

Has anyone encountered this problem in the middle of the night or knows how to solve it? Please help! Thank you!

Has anyone encountered this problem in the middle of the night or knows how to solve this problem? Please help! Thank you!
Before giving focus to the textarea, determine whether it exists

Has anyone encountered this problem in the middle of the night, or knows how to solve this problem? Please help! Thank you!
Determine whether textarea exists before giving it focus. What does this mean? Can you give an example? This textarea box is clearly displayed there! But I can't enter anything when I click on it, and the cursor doesn't appear!