JavaScript how do you modify the actual css of a class rather than add a style to each element of that class? [duplicate]

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I've seen so many different posts that pertain to my situation, but I'm still learning server side and js code, so I just don't understand how to apply it to my problem yet. I'm trying to build an ...

I've seen so many different posts that pertain to my situation, but I'm still learning server side and js code, so I just don't understand how to apply it to my problem yet. I'm trying to build an ...

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I have made a quite simple hangman game but I have run into some issues. If I lose a few games in a row, my array that contains wrong letters will be filled up even though I empty it when I start a ...

I have made a quite simple hangman game but I have run into some issues. If I lose a few games in a row, my array that contains wrong letters will be filled up even though I empty it when I start a ...

Excuse me (I can not write good English!) i want to when change combobox selected item, this item (selected item) hide in other combobox and when change again selected hide item show again in other ...

Excuse me (I can not write good English!) i want to when change combobox selected item, this item (selected item) hide in other combobox and when change again selected hide item show again in other ...

TreeView creation: function CreateNotificationTree(userId) { debugger; var data = new kendo.data.HierarchicalDataSource({ transport: { read: { url: "../api/...

TreeView creation: function CreateNotificationTree(userId) { debugger; var data = new kendo.data.HierarchicalDataSource({ transport: { read: { url: "../api/...