hide a div if a condition

Question

who can i hide a div if a condition is true

Answer 1

https://code.sololearn.com/W6YAY83uqdln/?ref=app

Answer 2

you can try this:

document.getElementsByTagName ("div")[0].style.display ='none';

Answer 3

https://code.sololearn.com/W0AYJUE9dl06/?ref=app

Answer 4

window.onload=function(){
document.querySelector("div").style.display="none";
}

Answer 5

@Muhd Khairul Amirin Bin Yaacob it didn't work this is the error Uncaught TypeError: Cannot read property 'style' of null
at window.onload

Answer 6

@Muhd Khairul Amirin Bin Yaacob i do it bro thanks a lot but the problem now is the function is activated just one time because i have two table and 2 messages box .they switch every 5secondes with a toggle function .the message box is showen if the tables both have a "nok" in a column the message box show the name of the customers with status "nok". so when just one table have a "nok" the message box are hidden ; The function i create work but just one time .

this is my code
https://code.sololearn.com/WD31Xd33L846/#html
and thanks a lot