Come aggiungere correttamente Javascript in functions.php

Iltuo $scrneltuo wp_register_script() lafunzione è sbagliata. Dato cheiltuofunctions.php è all'interno deltuoplugine iltuo removeArrows.js ènella radice deltuoplugin,iltuo $scr dovrebbeessere simile a questo

 plugins_url( '/removeArrows.js' , __FILE__ )
 

Un altropunto danotare,è sempre unabuonapratica caricaregli scripte gli stiliper ultimi. Ciògarantirà chenon venga sovrascritto da altri scripte stili. Perfare ciò,aggiungi unaprioritàmoltobassa (numeromolto alto) altuoparametro dipriorità ($priority) di add_action .

  add_action( 'wp_enqueue_scripts', 'wpb_adding_scripts', 999 ); 
 

E sempre carica/accoda scripte stilitramite wp_enqueue_scripts action hook,poiché questo è l'hook corretto da usare. Non caricare scripte stili direttamentein wp_head o wp_footer

<"EDIT

Peri temi,poiché haiindicato che ora hai spostatotuttoneltuotema,iltuo $scr cambierebbein questo

  get_template_directory_uri() . '/removeArrows.js'
 

peri temiprincipalie questo

 get_stylesheet_directory_uri() . '/removeArrows.js'
 

pertemi figlio. Il codice completo dovrebbeessere simile a questo

 function wpb_adding_scripts() {
    wp_register_script('my_amazing_script', get_template_directory_uri() . '/removeArrows.js', array('jquery'),'1.1', true);
    wp_enqueue_script('my_amazing_script');
} 

add_action( 'wp_enqueue_scripts', 'wpb_adding_scripts', 999 ); 
 

Your $scr in your wp_register_script() function is wrong. Given that your functions.php is inside your plugin, and your removeArrows.js is in the root of your plugin, your $scr should look like this

plugins_url( '/removeArrows.js' , __FILE__ )

Another point of note, it is always good practice to load your scripts and styles last. This will ensure that it will not get overriden by other scripts and styles. To do this, just add a very low priority (very high number) to your priority parameter ($priority) of add_action.

 add_action( 'wp_enqueue_scripts', 'wpb_adding_scripts', 999 ); 

And always load/enqueue scripts and styles via the wp_enqueue_scripts action hook, as this is the proper hook to use. Do not load scripts and styles directly to wp_head or wp_footer

EDIT

For themes, as you've indicated that you now moved everything to your theme, your $scr would change to this

 get_template_directory_uri() . '/removeArrows.js'

for parent themes and this

get_stylesheet_directory_uri() . '/removeArrows.js'

for child themes. Your complete code should look like this

function wpb_adding_scripts() {
    wp_register_script('my_amazing_script', get_template_directory_uri() . '/removeArrows.js', array('jquery'),'1.1', true);
    wp_enqueue_script('my_amazing_script');
} 

add_action( 'wp_enqueue_scripts', 'wpb_adding_scripts', 999 ); 

Non aggiungerei un altrofilejsesterno,è solo una risorsaextrae nonnecessaria da recuperaree questo è qualcosa che vogliamo ridurrein termini ditempi di caricamento dellapagina.

Aggiungerei questo snippetjQuerynellatestata deltuo sito web utilizzando l'hook wp_head. Dovrestiincollare quanto segueneltuotema onelfile dellefunzioni deiplugin. Mi sono anche assicurato chejQueryfossein modalità senza conflitti,comepuoi vedere di seguito.

 add_action('wp_head','woocommerce_js');

function woocommerce_js()
{ // break out of php ?>

jQuery(document).ready(function($) {
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace(" →", "");
    });
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace("← ", "");
    });
});
<?php } // break back into php
 

Dopo avereseguito questa operazionee aggiornato lapagina,controlla l'origine dellapaginaper assicurarti che questoframmento dijQuery vengaeffettivamente caricatonellatuapagina. Se lo è,dovrebbefunzionare ameno chenon sia qualcosa di sbagliatonello snippetjQuery che stai utilizzando.

I would not add another external js file, its just an extra and unnecessary resource to fetch and that is something we want to cut down on in terms of page loading times.

I would add this jQuery snippet in your websites head using the wp_head hook. You would paste the following in your theme or plugins functions file. I have also made sure jQuery is in no-conflict mode as you can see below.

add_action('wp_head','woocommerce_js');

function woocommerce_js()
{ // break out of php ?>

jQuery(document).ready(function($) {
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace(" →", "");
    });
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace("← ", "");
    });
});
<?php } // break back into php

Once you have done this and refreshed your page, check the page source to make sure this jQuery snippet is in fact being loaded into your page. If it is then it should work unless their is something off in the actual jQuery snippet you are using.

Poiché la risposta ègià accettata,voglio solo dire cheesiste un altromodoper accodareil codice JavaScriptnelpiè dipagina,cosa che hofattomolte volte.

nelfilefunctions.php:

 function load_script_to_remove_arrow(){
?>
<script>
$(document).ready(function() {
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace(" →", "");
    });
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace("← ", "");
    });
});
</script>
<?php
}
add_action( 'wp_footer', 'load_script_to_remove_arrow' );
 

puoi caricare questo scriptin unparticolaremodello dipagina solo utilizzando la condizione

 if( is_page_template( 'page-template.php' ) ):

//put above code (or just add_action part) inside this condition to load file only if the condition is true 

endif;
 

seilpage-template.php ènella directory (diciamo la directorytemplatesnella directory root deltuotema)puoi scrivere come:

 is_page_template( 'templates/page-template.php' );
 

As the answer is accepted already so, I just want to say there's another way to enqueue javascript code in footer which I have done many times.

in functions.php file:

function load_script_to_remove_arrow(){
?>
<script>
$(document).ready(function() {
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace(" →", "");
    });
    $(".woocommerce-cart").html(function(i, val) {
    return val.replace("← ", "");
    });
});
</script>
<?php
}
add_action( 'wp_footer', 'load_script_to_remove_arrow' );

you can load this script to particular page template only by using condition

if( is_page_template( 'page-template.php' ) ):

//put above code (or just add_action part) inside this condition to load file only if the condition is true 

endif;

if the page-template.php is in directory ( say templates directory in your theme's root dir ) you can write like:

is_page_template( 'templates/page-template.php' );

Per rispondere alla domanda dobbiamoprimafare una distinzionetrajavascripte JQuery.

Per dirloin modo semplice:

• Javascript èbasato su ECMAScript
• JQuery è una libreriaper Javascript

Quindi,in realtà,fai due domande diverse:

• Iltuotitoloparla di una soluzioneper l'implementazione dijavascript
• Latua domandaparla di una soluzioneper l'implementazione di JQuery

Poichéi risultati di Googlemostranoiltuotitoloe tuttoil contenuto dellapaginaparla di JQuery,questopuò diventaremoltofrustranteper lepersone che cercano una soluzionejavascript.

E oraper la soluzione JQuery:

 wp_enqueue_script( 'script-id', get_template_directory_uri() . '/js/script.js', array ( 'jquery' ), 1.1, true);
 

E la soluzionejavascript:

 wp_enqueue_script( 'script-id', get_template_directory_uri() . '/js/script.js', array(), '1.0.0', true );
 

Questo codicepuòessere aggiunto altuofunctions.php Laposizione degli scriptin entrambii casi è wp-content/themes/theme-name/js/script.js

Buonaprogrammazione!

To answer the question we must first make a distinction between javascript and JQuery.

To state it in a simple fashion:

• Javascript is based on ECMAScript
• JQuery is a library for Javascript

So in reality you ask two different questions:

• Your title speaks about a solution for implementing javascript
• Your question speaks about a solution for implementing JQuery

Because the Google results show your title and all the content of the page talks about JQuery this can become very frustrating to people that search for a javascript solution.

And now for the JQuery solution:

wp_enqueue_script( 'script-id', get_template_directory_uri() . '/js/script.js', array ( 'jquery' ), 1.1, true);

And the javascript solution:

wp_enqueue_script( 'script-id', get_template_directory_uri() . '/js/script.js', array(), '1.0.0', true );

This code can be added to your functions.php The location of the scripts in both cases is wp-content/themes/theme-name/js/script.js

Happy coding!