Search and highlight using JavaScript?

By Anonymous - February 26, 2019

Using a regex rule for search a word in JavaScript

new RegExp("Keyword",'gim')

And replace the keyword by '<span class=\"Highlight\">Keyword</span>'

Defined a 'Highlight' css class for highlight the keyword.

<style>
.Highlight
{
background-color:#FF9;
color:#555;
}
</style>

JQuery 'unwrap()' methord is used for unwrap the previously highlighted elements.

Final code and demo is here

<!DOCTYPE html><html lang="en"><head>  <title>Bootstrap Example</title>  <meta charset="utf-8">  <meta name="viewport" content="width=device-width, initial-scale=1">  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>  <style>  .Highlight   {    background-color:#FF9;     color:#555;   }   </style></head><body><div class="container">  <h2>Search and Highlight Using JavaScript</h2><form class="form-horizontal">    <div class="form-group">    <div class="col-sm-10">      <input type="text" class="form-control" id="Keyword" placeholder="Search..." value="Print">    </div><div class="col-sm-2">      <button type="button" class="btn btn-danger btn-block" onclick="SearchAndHighlight()">Search</button>    </div></div><div class="form-group">    <div class="col-sm-12">      <div id="TextData" class="well">      Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.<br/><br/>       Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting,  Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing   Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.<br/><br/> Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.       </div></div></div></form></div><script>function SearchAndHighlight() {  $(".Highlight").contents().unwrap();     var Keyword = $("#Keyword").val();     if(Keyword === "") return;  $("#TextData").html($("#TextData").html().replace(new RegExp(Keyword,'gim'),"<span class=\"Highlight\">$&</span>")); } $(document).ready(function() {  SearchAndHighlight(); }); </script></body></html>

Demo

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Search and highlight using JavaScript?

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