Tutorial by Examples

The browser identifies tokens from stylesheet and coverts them into nodes which are linked into a tree structure. The entire map of all the nodes with their associated styles of a page would be the CSS Object Model. To display the webpage, a web browser takes following steps. The web browser exa...

To add a background-image rule via the CSSOM, first get a reference to the rules of the first stylesheet: var stylesheet = document.styleSheets[0].cssRules; Then, get a reference to the end of the stylesheet: var end = stylesheet.length - 1; Finally, insert a background-image rule for the bo...