Utility functions shared by react-highlight-words and react-native-highlight-words.

API

The primary API for this package is a function exported as findAll. This method searches a string of text for a set of search terms and returns an array of "chunks" that describe the matches found.

Each "chunk" is an object consisting of a pair of indices (chunk.start and chunk.end) and a boolean specfifying whether the chunk is a match (chunk.highlight). For example:

import { findAll } from "highlight-words-core";

const textToHighlight = "This is some text to highlight.";
const searchWords = ["This", "i"];

const chunks = findAll({
  searchWords,
  textToHighlight
});

const highlightedText = chunks
  .map(chunk => {
    const { end, highlight, start } = chunk;
    const text = textToHighlight.substr(start, end - start);
    if (highlight) {
      return `<mark>${text}</mark>`;
    } else {
      return text;
    }
  })
  .join("");

Run this example on Code Sandbox.

findAll

The findAll function accepts several parameters, although only the searchWords array and textToHighlight string are required.

Parameter	Required?	Type	Description
autoEscape		boolean	Escape special regular expression characters
caseSensitive		boolean	Search should be case sensitive
findChunks		Function	Custom find function (advanced)
sanitize		Function	Custom sanitize function (advanced)
searchWords	✅	Array<string>	Array of words to search for
textToHighlight	✅	string	Text to search and highlight

License

MIT License - fork, modify and use however you want.