Featured Image not showing in admin

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Currently im making new theme and had the idea of adding featured image in the admin side of wordpress, unfortunately its not working this is what i have tried

I have added this code in functions.php

add_theme_support( 'post-thumbnails');

i also tried to change it 

add_theme_support( 'post-thumbnails', array( 'post' ) ); // Add it for posts
add_theme_support( 'post-thumbnails', array( 'page' ) ); // Add it for pages

after i refresh and log in to my admin panel and tried to create new post or page
featured image is not displaying and

after my set up function which is ja_theme_setup this is my code

add_action('after-setup_theme','ja_theme_setup' );

and also i have tried to look at SCREEN OPTIONS but i dont have any availble checkbox related to featured image..Please help me guys

NOTE:
My wp-config.php file debug options is set to true

define('WP_DEBUG', true);

and yet i dont have any errors

3 Answers
3

You have misspelled the action hook name.

This:

add_action( 'after-setup_theme', 'ja_theme_setup' );

Should be:

add_action( 'after_setup_theme', 'ja_theme_setup' );

The full code:

add_action( 'after_setup_theme', 'ja_theme_setup' );
function ja_theme_setup() {
    add_theme_support( 'post-thumbnails');
}

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