Note: This style is not necessary for the code to work. This can help the user understand that a given element can be interacted with by, for example, clicking on the link. Setting the style to pointer causes the cursor to change appearance, making it look like a hand. The cursor: pointer style modifies the display of the mouse cursor, which is used to show the mouse’s current position on the screen. This code defines a header element( ), an onclick event, and a single style – cursor: pointer. The first approach to changing CSS with JavaScript will be to leverage inline styling.

A function in charge of making the change -This can change most CSS style elements, with the exception of CSS selectors.

It can also be done with CSS pseudo-classes – more on these below.

An event to trigger the change – This can be a DOM event or a JavaScript event as in the case of setTimeout().

Two things are required in order to make CSS changes: Each approach has its advantages and disadvantages, but we’ll explore them in another article.

External – using a element which links to an external CSS fileĪll three approaches are explored below.

Internal – using a element in the HTML document’s.

Inline – using the style attribute inside HTML elements.

There are three ways CSS can be applied to an HTML document: CSS is a set of structured rules describing the layout of elements in an HTML document. function addCssRules(selector, rules, /*Optional*/ sheetName) ', Style Sheets (CSS) is used to design the layout of a webpage. Works with FF, Chrome, and IE9+ (maybe earlier too, untested).

It will make at most one new style element and re-use it on future function calls). Here's my general-purpose function which parametrizes the CSS selector and rules, and optionally takes in a css filename (case-sensitive) if you wish to add to a particular sheet instead (otherwise, if you don't provide a CSS filename, it will create a new style element and append it to the existing head.

Css for js