使用wp_enqueue_script（）在Wordpress-functions.php中添加Javascript

Question

I want to add my custom javascript to my wordpress page.

I tried it usign wp_enqueue_script() but its not working. When I tried to add script directly in Inspect element it works properly so my script is correct.

Now I create function in function.php file to add script and its not working. It shows script / file is loaded in page when I check source of page. But it doing nothing.

Below is my script and function.

Javascript -

jQuery(".tp-tab").mouseenter(function() {
  jQuery('.tp-tab').removeClass("selected");
});
jQuery(".tp-tab").click(function() {
  jQuery(this).addClass("selected");
});

Function in function.php

    function mytheme_custom_scripts() {

            if ( !is_admin() ) {
                $scriptsrc = get_stylesheet_directory_uri() . '/wp-content/themes/circles/js/';
                wp_register_script( 'myhandle', $scriptsrc . 'slider_hover_effect.js', 'jquery', '1.0',  false );
                wp_enqueue_script( 'myhandle' );
            }

        }

add_action( 'wp_enqueue_scripts', 'mytheme_custom_scripts' );

In /wp-content/themes/circles/js/ directory location my script is palced with file name of slider_hover_effect.js which contain above javascript code.

Please let me know is there any other way I can add this script in my wordpress website. Also I want to add/apply this script only for Homepage. So is this possible.

Thanks,

Update

I am not sure about that I should provide complete path after get_stylesheet_directory_uri() or just /js/ folder.

Or

Can I use like -

function slider_effect() { ?>
    <script type="text/javascript">

jQuery(".tp-tab").mouseenter(function() {
  jQuery('.tp-tab').removeClass("selected");
});
jQuery(".tp-tab").click(function() {
  jQuery(this).addClass("selected");
});

    </script>

    <?php

}

add_action('wp_head','slider_effect');

Answer 1

In your functions.php

function mytheme_custom_scripts(){
    if ( is_home() || is_front_page()) {
            $scriptSrc = get_template_directory_uri() . '/js/slider_hover_effect.js';
            wp_enqueue_script( 'myhandle', $scriptSrc , array(), '1.0',  false );
    }
}
add_action( 'wp_enqueue_scripts', 'mytheme_custom_scripts' );

JavaScript file (slider_hover_effect.js)

$( document ).ready(function($) {
    $( 'body' ).on( 'mouseenter', '.tp-tab', function () {
        $(this).removeClass("selected");
    });
    $( 'body' ).on( 'click', '.tp-tab', function () {
        $(this).addClass("selected");
    });
});

1. Check if there is any error in browser console.
2. View page source and see if the file is included at the bottom of source.
3. There might be some precedence issue, to check that try to change 'false' parameter to 'true' in wp_enqueue_script function (so the script will be added to header).

I hope this helps.

Answer 2

Try this:

functions.php

function mytheme_custom_scripts() {
// No need to check admin, 'wp_enqueue_scripts' only enqueues at the frontend 
            $scriptsrc = get_stylesheet_directory_uri() . '/js/';
            wp_register_script( 'myhandle', $scriptsrc . 'slider_hover_effect.js', array('jquery'), '1.0',  false );
            wp_enqueue_script( 'myhandle' );

    }

add_action( 'wp_enqueue_scripts', 'mytheme_custom_scripts' );

Check full codex: https://developer.wordpress.org/reference/functions/wp_enqueue_script

You should not print JS in 'wp_head' unless you can't do otherwise.

slider_hover_effect.js

jQuery(document).ready(function($){
   $(".tp-tab").mouseenter(function() {
     $(this).removeClass("selected");
   });
   $(".tp-tab").click(function() {
     $(this).addClass("selected");
   });
});

Answer 3

Try this ,change !is_admin() with is_home()

 function mytheme_custom_scripts() {
          if ( is_home() ) {
                    $scriptsrc = get_stylesheet_directory_uri() . '/js/';
                    wp_enqueue_script( 'myhandle', $scriptsrc . 'slider_hover_effect.js', array(), '1.0',  false );
           }
     }

add_action( 'wp_enqueue_scripts', 'mytheme_custom_scripts' );

or:

function slider_effect() {
if ( is_home() ) {
 ?>
    <script type="text/javascript">
jQuery(function(){
jQuery(".tp-tab").mouseenter(function() {
  jQuery('.tp-tab').removeClass("selected");
});
jQuery(".tp-tab").click(function() {
  jQuery(this).addClass("selected");
});
});
    </script>

    <?php }

}

add_action('wp_head','slider_effect');

Answer 4

I believe you forgot the src parameter in the wp_enqueue_script when you called it in your callback mytheme_custom_scripts

From wordpress docs:

wp_enqueue_script ( string $handle, string|bool $src = false, array $deps = array(), string|bool $ver = false, bool $in_footer = false )

Parameters

$handle (string) (Required) Name of the script.

$src (string|bool) (Optional) Path to the script from the root directory of WordPress. Example: '/js/myscript.js'. Default value: false

So I believe your code should be:

 wp_enqueue_script( 'myhandle' , $scriptsrc . 'slider_hover_effect.js');

---

Another way is if you can create your custom plugin and activate that plugin to allow you to include custom js or css like this in your index.php file of the plugin:

add_action( 'init', 'my_script' );

function my_script() {
    if( is_home() ){
        wp_enqueue_script('my_script', plugins_url('js/script.js', __FILE__), array('jquery'));
        wp_enqueue_style('my_style', plugins_url('css/style.css', __FILE__));
    }
}

You place the files in the js/ or css/ dir and this works