JAVASCRIPT CSS HTML CLASSES HOW TO
JAVASCRIPT CSS HTML CLASSES CODE

The next approach to changing CSS with JavaScript uses internal styling. Inline CSS thus overrides most other CSS declarations. Note: Inline CSS is the most specific way to apply styles to an element, and as such this method has precedence over the other two CSS modification options. This will be visible when using the browserвЂ™s development tools, with the changes persisted to the element upon completion. If the style attribute has not been previously defined, setAttribute simply adds it to the element upon completion of execution.ДЄfter the click event handler has completed, the tag will have blue for its color, instead of the red value that was already present. Next, the function applies setAttribute() to reset the style attribute of the element. This sets our element as the active object being modified. The function declares the variable to hold the element вЂ“ el вЂ“ and assigns the event.target value to it. The changeColor() function receives the DOM event as a parameter, making it very easy to operate on the specific tag that was clicked. This event is handled by the changeColor() function. The triggering DOM event is onclick, which is defined inside the element. The HTML element does not need to have a clear class defined in order for the JavaScript to modify its contents.

JAVASCRIPT CSS HTML CLASSES CODE

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 mouseвЂ™s current position on the screen. This code defines a header element( ), an onclick event, and a single style вЂ“ 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 вЂ“ more on these below.

An event to trigger the change вЂ“ 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 weвЂ™ll explore them in another article.

External вЂ“ using a element which links to an external CSS fileДЄll three approaches are explored below.

Internal вЂ“ using a element in the HTML documentвЂ™s.

Inline вЂ“ 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.

JAVASCRIPT CSS HTML CLASSES HOW TO

Home > Tutorials > JavaScript > How to Change CSS Using JavaScript JavaScript - How to Change CSS Using JavaScript Cascading Style Sheets (CSS) is used to design the layout of a webpage.

Javascript css html classes