Nick Haskins

WP Live Search (beta) is a search plugin for WordPress that returns results as the user types for what they are looking. It currently supports posts, pages, post types, including multiple post types, and design modes.
This is very much a working prototype, so please log any issues you find on the Github repo below. 
<a href="https://github.com/bearded-avenger/wp-live-search" rel="nofollow ugc">https://github.com/bearded-avenger/wp-live-search</a>
Here’s some documentation. 
<a href="http://bearded-avenger.github.io/wp-live-search/" rel="nofollow ugc">http://bearded-avenger.github.io/wp-live-search/</a>
Add the shortcode <code>[wp_live_search]</code> to a page or something. There’s a few shortcode attributes that you can use, and are as follows:
type=”” 
Your choices are <code>posts</code> or <code>pages</code>. Defaults to <code>posts</code>. You can also pass <code>type,type</code> to search multiple post types. For example type=”recipes,books”
multi=”” 
By default this is turned off. Set this to true only if you’re using multiple post types above.
placeholder=”” 
The text displayed in the input. Defaults to <code>Search...</code>.
number=”” 
Total search result to return. Default is 20
excerpt=”true” 
Show the excerpt along with the title and featured image (if set)
compact=”true” 
Makes a tiny WP Live Search for use in header widgets and such
dropdown=”true” 
Display search results as a drop-down instead of pushing down the content around it
results=”” 
The text displayed for the results. Defaults to <code>entries found</code>.
results_style=”inside” 
Displays the “entries found” inside of the input area, useful for using in areas like header widgets where space is minimal.
target=”” 
An optional target UL parent to send the search results to. Example <code>target="#someotherdiv"</code>.
Here are a couple examples:
Default Usage: 
 [wp_live_search]
Use in Header Widget: 
 [wp_live_search compact=”true” dropdown=”true” results=”found” results_style=”inside”]
Search through multiple post types: 
 [wp_live_search multi=”true” type=”posts,page”]

WP Live Search

A super light-weight live search plugin that utilizes the WP REST API.

Shail Mehta

This plugin use for live search for post without page refresh Using Shortcode [live-post-search]
Primary Features 
* Very easy to use just copy this Shortcode [live-post-search] 
* A front-end Custom Search 
* Live Search without page refresh 
* This plugin is free

Live search for post

Custom Live Search For Searching Post using Shortcode [live-post-search]

WP Live Search vs Live search for post