React component to highlight words within a larger body of text.
Check out a demo here.
Usage
To use it, just provide it with an array of search terms and a body of text to highlight.
Try this example in Code Sandbox.
import React from "react";
import ReactDOM from "react-dom";
import Highlighter from "react-highlight-words";
ReactDOM.render(
<Highlighter
highlightClassName="YourHighlightClass"
searchWords={["and", "or", "the"]}
autoEscape={true}
textToHighlight="The dog is chasing the cat. Or perhaps they're just playing?"
/>,
document.getElementById("root")
);And the Highlighter will mark all occurrences of search terms within the text:
Props
| Property | Type | Required? | Description |
|---|---|---|---|
| activeClassName | String | The class name to be applied to an active match. Use along with activeIndex |
|
| activeIndex | String | Specify the match index that should be actively highlighted. Use along with activeClassName |
|
| activeStyle | Object | The inline style to be applied to an active match. Use along with activeIndex |
|
| autoEscape | Boolean | Escape characters in searchWords which are meaningful in regular expressions |
|
| className | String | CSS class name applied to the outer/wrapper <span> |
|
| caseSensitive | Boolean | Search should be case sensitive; defaults to false |
|
| findChunks | Function | Use a custom function to search for matching chunks. This makes it possible to use arbitrary logic when looking for matches. See the default findChunks function in highlight-words-core for signature. Have a look at the custom findChunks example on how to use it. |
|
| highlightClassName | String or Object | CSS class name applied to highlighted text or object mapping search term matches to class names. | |
| highlightStyle | Object | Inline styles applied to highlighted text | |
| highlightTag | Node | Type of tag to wrap around highlighted matches; defaults to mark but can also be a React element (class or functional) |
|
| sanitize | Function | Process each search word and text to highlight before comparing (eg remove accents); signature (text: string): string |
|
| searchWords | Array<String | RegExp> | ✓ | Array of search words. String search terms are automatically cast to RegExps unless autoEscape is true. |
| textToHighlight | String | ✓ | Text to highlight matches in |
| unhighlightClassName | String | CSS class name applied to unhighlighted text | |
| unhighlightStyle | Object | Inline styles applied to unhighlighted text |
Custom highlight tag
By default this component uses an HTML Mark Text element (<mark>) to wrap matched text, but you can inject a custom tag using the highlightTag property. This tag should be a React component that accepts the following properties:
| Property | Type | Description |
|---|---|---|
| children | String | Text to be highlighted |
| highlightIndex | Number | Index of matched text |
For example:
const Highlight = ({ children, highlightIndex }) => (
<strong className="highlighted-text">{children}</strong>
);Installation
yarn add react-highlight-words
npm i --save react-highlight-words
License
MIT License - fork, modify and use however you want.
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