//wp style  in functions.php
<?php wp_register_style( $handle, $src, $deps, $ver, $media ); ?>
<?php
function newsfeed_styles()
{
    // Register the style like this for a theme:
    wp_register_style( 'newsfeed_bootstrapmin', get_template_directory_uri() . '/bootstrap.min.css',array(),'3.0.1','all' );
    // For either a plugin or a theme, you can then enqueue the style:
    wp_enqueue_style( 'newsfeed_bootstrapmin' );
}
add_action( 'wp_enqueue_scripts', 'newsfeed_styles' );
?>
wp_register_script( string $handle, string $src, array $deps = array(), string|bool|null $ver = false, bool $in_footer = false )
<?php
//wp enqueue sctipt in functions.php
function functionNameHere(){
  wp_deregister_script('jquery');
  wp_register_script( 'newsfeed_bootstrapjs', get_template_directory_uri() . '/assets/js/bootstrap.min.js', false, null, true );

  wp_enqueue_script( 'newsfeed_bootstrapjs' );
  }
add_action('wp_enqueue_scripts','functionNameHere');
?>
//others way

<?php


//wp_register_script( string $handle, string $src, array $deps = array(), string|bool|null $ver = false, bool $in_footer = false )

function functionNameHere(){
    wp_enqueue_script('jquery');
    wp_enqueue_script('easing-js',get_template_directory_uri().'/.easing.1.3.js',array(),'1.3',true);

    wp_enqueue_script( 'easing-js' );
}
add_action('wp_enqueue_scripts','functionNameHere');
 ?>