need to add a class to an element

Question

here s my code    lt body gt   lt header gt   lt h1 gt Html quiz lt  h1 gt   lt  header gt   lt article gt   lt h2 gt What color is this  amp nbsp  amp nbsp   00ff00   lt ul gt       lt li gt       lt input type  radio  name  color1  id  red    gt  amp nbsp  amp nbsp red      lt  li gt       lt li gt       lt input type  radio  name  color1  id  green    gt  amp nbsp  amp nbsp green      lt  li gt       lt li gt       lt input type  radio  name  color1  id  blue    gt  amp nbsp  amp nbsp blue      lt  li gt       lt li gt       lt input type  radio  name  color1  id  teal    gt  amp nbsp  amp nbsp teal      lt  li gt       lt li gt       lt input type  submit  name  submit  value  Submit  onClick  fsubmit      gt       lt  li gt   lt  ul gt   lt  article gt   lt div id  result  gt   lt  div gt   lt script gt  function fsubmit     var answer   document getElementById  green    var result   document getElementById  result    if answer checked    true   result innerHTML  correct     else  result class  red    result innerHTML  wrong       lt  script gt   lt  body gt    It s the first bit of code result class  red  does nothing and the debugging console on chrome doesn t indicate a problem

User · Answer

You should be using className  result className    red

User · Answer

You probably need something like   result className    red     In pure JavaScript you should use className to deal with classes  jQuery has an abstraction called addClass for it

User · Answer

You are missing a closing h2 tag  It should be    lt h2 gt  lt  -- Content -- gt  lt  h2 gt

User · Answer

You can use result className    red    but you can also use result classList add  red     The  classList add str  way is usually easier if you need to add a class in general  and don t want to check if the class is already in the list of classes

User · Answer

Try using setAttribute on the result   result setAttribute  class   red

[javascript] need to add a class to an element

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