React change highlight

React Change Highlight is a react component to highlight changes in the wrapped component to enhance the UX and grab the focus of the user into the changed value of some parts like the cart in an e-commerce application for example.

This is a real use case I'm using in a project

You can play around with it on this sandbox codesandbox.io/react-change-highlight .. or clone the repo and play around with the all examples in the examples folder

Install

yarn add react-change-highlight

or

npm install react-change-highlight

Usage

Basically you need to wrap the components you want to highlight on change inside ChangeHighlight element (default import) then add ref attribute to each child in this component which you want to highlight when they got their content changed.

In the following example the count variable comes from state, so when ever that function setCount() is called with any different value the background of that wrapped div will be changed as a default action, but actually it can be any kind of animation you make into the class you will pass to highlightStyle attribute.

import ChangeHighlight from "react-change-highlight";

export default () => {
  const [count, setCount] = useState(0);

  return (
    <ChangeHighlight>
      <div ref={React.createRef()}>{count}</div>
    </ChangeHighlight>
  );
};

Default styling for highlighting in case the user didn't use a custom styling using the highlightStyle property is rc-highlight class and it is as follow:

.rc-highlight {
  background-color: #f8ffb4;
  transition: all 0.5s ease-in-out;
}

SSR (server-side rendering)

In case of using this module in a server-side rendering app, you should make sure to create and pass your own className to the highlightStyle attribute, and to make some hint for you, add ssr attribute to the ChangeHighlight element, so it can give you a hint to add a class in your console as a warning like this.

⚠️ "react-change-highlight", As you're using server-side rendering, it's a must to create and pass your css class to the highlightStyle attribute for "ChangeHighlight" component

Props

Property	Type	Default	Descriptio
showAfter	number	500	number of milli seconds before start highlighting
hideAfter	number	2500	number of milli seconds before ending highlighting
mode	change or newOnly	change	mode of the detection, either change which is the default one to detect the changes in the parsed elements or newOnly which is useful in case of newly added element highlight (check todo example)
disabled	boolean	false	whether you need to disable highlighting
ssr	boolean	false	you need to pass this in case of using it with server-side rendering. (gives a hint for adding style)
highlightClassName	string		className for highlighing content (a must in case of SSR)
containerClassName	string		className for component container