angadsethi / vue-highlight-words

🖍 Vue component to highlight words within a larger body of text.

vue-highlight-words

ℹ️ This is the branch for vue-highlight-words 2 (For Vue 3). If you are looking for Vue 2.0 support, please check out 1.0 branch

A simple port from react-highlight-words

Vue component to highlight words within a larger body of text.

demo

Why?

It uses render to handle the highlighted text instead of using v-html or el.innerHtml.

Installation

npm i --save vue-highlight-words

Usage

To use it, just provide it with an array of search terms and a body of text to highlight.

<template>
  <div id="app">
    // attrs on component are applied to the wrapper `<span>`
    <Highlighter class="my-highlight" :style="{ color: 'red' }"
      highlightClassName="highlight"
      :searchWords="keywords"
      :autoEscape="true"
      :textToHighlight="text"/>
  </div>
</template>

<script>
import Highlighter from 'vue-highlight-words'

export default {
  name: 'app',
  components: {
    Highlighter
  },
  data() {
    return {
      text: 'The dog is chasing the cat. Or perhaps they\'re just playing?',
      words: 'and or the'
    }
  },
  computed: {
    keywords() {
      return this.words.split(' ')
    }
  }
}
</script>

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	Number		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
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		CSS class name applied to highlighted text
highlightStyle	Object		Inline styles applied to highlighted text
sanitize	Function		Process each search word and text to highlight before comparing (eg remove accents); signature (text: string): string
searchWords	Array	✓	Array of search words. The search terms are treated as RegExps unless autoEscape is set.
textToHighlight	String	✓	Text to highlight matches in

Custom render with v-slot

Use a default slot with v-slot props

type SlotProps = HighlighterItem[]

type HighlighterItem = {
  text: string // chunk of text to render
  attrs: HighlightAttrs
  chunk: Chunk
}

type HighlightAttrs = {
  class: string // class for highlight tag: highlightClassNames
  key: number // index of the chunk
  style: Partial<CSSStyleDeclaration> // highlightStyles
  highlightIndex: number // index of highlight tag
}

type Chunk = {
  start: number
  end: number
  highlight: boolean
}

For example:

  <template>
    <div id="app">
      // attrs on component are applied to the wrapper `<span>`
      <Highlighter class="my-highlight" :style="{ color: 'red' }"
        highlightClassName="highlight"
        :searchWords="keywords"
        :autoEscape="true"
-       :textToHighlight="text"/>
+       :textToHighlight="text"
+       v-slot="items">
+       <div>
+         <span v-for="{chunk, text, attrs} in items" :key="attrs.key"
+           :class="{chunk.highlight: 'highlight' : ''}"
+         >{{text}}</span>
+       </div>
+     </Highlighter>
    </div>
  </template>

  <script>
  import Highlighter from 'vue-highlight-words'

  export default {
    name: 'app',
    components: {
      Highlighter
    },
    data() {
      return {
        text: 'The dog is chasing the cat. Or perhaps they\'re just playing?',
        words: 'and or the'，
      }
    },
    computed: {
      keywords() {
        return this.words.split(' ')
      }
    }
  }
  </script>

Project setup

pnpm install

Compiles and hot-reloads for development

pnpm dev

Compiles and minifies for production

pnpm build

Lints and fixes files

pnpm lint

License

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