Use different javascript files for each page on website

Question 1

I’m currently trying to create my first ever theme on wordpress. I’m hosting it locally until I can get it all working and then I will use the theme on a website.

Everything was going great until I got to the javascript. Each page on the theme has a character counter box which counts up counters as the user enters them. Each of these boxes has it’s own javascript file.

I put one javascript file in the header.php file and that page that uses that file works (the home page), but I want to be able to create different page templates and on those templates use different files?

Is this possible.

(Not sure if I’ve explained this well enough, as I said I’m new to the whole theme development side of wordpress)

Thanks in advance, and be sure to ask for more details.

    <?php

function themeslug_enqueue_script() {
    wp_enqueue_script( 'my-js', '/js/char-counter.min.js', false );
}

add_action( 'wp_enqueue_scripts', 'themeslug_enqueue_script' );

// Register Custom Navigation Walker
require_once('wp_bootstrap_navwalker.php');

// Theme Support
function wpb_theme_setup(){
    // Nav Menu
    register_nav_menus(array(
      'primary' => __('Primary Menu ')
    ));
}

  add_action('after_setup_theme', 'wpb_theme_setup');

  // Register scripts/styles. They can be optionally enqueued later on.
  add_action( 'wp_loaded', 'wpse248829_register_scripts' );
  function wpse248829_register_scripts() {
      wp_register_script( 'character-counter-script-js', get_template_directory_uri() . 'http://localhost/mysite/wp-content/themes/char-counter/js/char-counter.min.js', array( 'jquery' ), true );
      wp_register_script( 'tweet-counter', get_template_directory_uri() . 'http://localhost/mysite/wp-content/themes/char-counter/js/tweet-counter.min.js', array(), true );
      wp_register_script( 'title-tag-counter-script', get_template_directory_uri() . 'http://localhost/mysite/wp-content/themes/char-counter/js/title-tag.min.js', array(), true );
      wp_register_script( 'description-counter-script', get_template_directory_uri() . 'http://localhost/mysite/wp-content/themes/char-counter/js/description-tag.min.js', array(), true );
  }

  // Enqueue scripts/styles.
  add_action( 'wp_enqueue_scripts', 'wpse248829_enqueue_scripts' );
  function wpse248829_enqueue_scripts() {
      // Load everywhere.
      wp_enqueue_style( 'style', get_stylesheet_uri() );
      wp_enqueue_script( 'script', get_template_directory_uri() . '/js/jquery.min.js', array ( 'jquery' ), 1.1, true);

      // Only enqueue scripts/styles on static front page.
      if ( is_front_page() ) {
        wp_enqueue_script( 'character-counter-script-js' );
    }

      if ( is_page_template( 'tweet-template.php' ) ) {
          wp_enqueue_script( 'tweet-counter' );
      }

      if ( is_page_template( 'title-tag-template.php' ) ) {
          wp_enqueue_script( 'title-tag-counter-script' );
      }

      if ( is_page_template( 'description-tag-template.php' ) ) {
          wp_enqueue_script( 'description-counter-script' );
      }
  }

That’s what my functions.php file looks like

    <!DOCTYPE html>
<html dir="ltr" lang="en-GB" prefix="og: http://ogp.me/ns#">

<head>

  <meta charset="https://wordpress.stackexchange.com/questions/248829/<?php bloginfo("charset'); ?>">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- Bootstrap Core CSS -->
  <link href="https://wordpress.stackexchange.com/questions/248829/<?php bloginfo("template_url') ?>/css/bootstrap.css" rel="stylesheet">

    <!-- Custom Fonts -->
  <link href="vendor/font-awesome/css/font-awesome.min.css" rel="stylesheet" type="text/css">
  <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
  <link href="https://fonts.googleapis.com/css?family=Merriweather:400,300,300italic,400italic,700,700italic,900,900italic" rel="stylesheet" type="text/css">
    <link href="https://fonts.googleapis.com/css?family=Lato:400,700,900" rel="stylesheet" type="text/css">


    <link href="https://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css" rel="stylesheet">

    <!-- Theme CSS -->


    <link rel="shortcut icon" href="http://wordpress.stackexchange.com/img/favicon.ico">

    <script src="https://load.sumome.com/" data-sumo-site-id="63887403fa39b3ec361069237f61eca50baf36e10e2973ac54b998b5095b3bb2" async="async"></script>


    <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
        <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
        <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
    <![endif]-->

        <title><?php wp_title(''); ?></title>

        <?php wp_head(); ?>

</head>

<body itemscope itemtype="http://schema.org/WebPage">

    <div id="wrapper" class="clearfix" itemprop="mainContentOfPage">

    <nav id="mainNav" class="navbar navbar-default navbar-static-top">
        <div class="container-fluid">
            <!-- Brand and toggle get grouped for better mobile display -->
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
                  <span class="sr-only">Toggle navigation</span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                </button>

                <?php if ( get_theme_mod( 'm1_logo' ) ) : ?>
                    <a href="<?php echo esc_url( home_url( "https://wordpress.stackexchange.com/" ) ); ?>" id="site-logo" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home">

                    <img src="<?php echo get_theme_mod( 'm1_logo' ); ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>">

                    </a>

                  <?php else : ?>

                    <hgroup>
                        <h1 class="site-title"><a href="<?php echo esc_url( home_url( "https://wordpress.stackexchange.com/" ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
                        <p class="site-description"><?php bloginfo( 'description' ); ?></p>
                    </hgroup>

                <?php endif; ?>
          </div>

            <!-- Collect the nav links, forms, and other content for toggling -->
            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                <ul class="nav navbar-nav navbar-right">
                  <?php
                wp_nav_menu( array(
                    'menu'              => 'primary',
                    'theme_location'    => 'primary',
                    'depth'             => 2,
                    'container'         => 'div',
                    'container_class'   => 'collapse navbar-collapse',
                    'container_id'      => 'bs-example-navbar-collapse-1',
                    'menu_class'        => 'nav navbar-nav',
                    'fallback_cb'       => 'wp_bootstrap_navwalker::fallback',
                    'walker'            => new wp_bootstrap_navwalker())
                );
            ?>
                </ul>
            </div>
            <!-- /.navbar-collapse -->
        </div>
        <!-- /.container-fluid -->
    </nav>

That’s my header.php file

Question 2

I put one javascript file in the header.php file and that page that
uses that file works (the home page)

Don’t do that. Use wp_enqueue_script() instead.

You can use conditional tags to load scripts and styles in the desired locations. For example, to check if a particular page template is being used, you’d use is_page_template().

Scripts and styles can be registered on the wp_loaded hook, then enqueued on the wp_enqueue_scripts hook:

// Register scripts/styles. They can be optionally enqueued later on.
add_action( 'wp_loaded', 'wpse248829_register_scripts' );
function wpse248829_register_scripts() {
    wp_register_script( 'character-counter-script-js', get_template_directory_uri() . '/js/char-counter.min.js', array( 'jquery' ), false, true );
    wp_register_script( 'tweet-counter', get_template_directory_uri() . '/js/tweet-counter.min.js', array( 'jquery' ), false, true );
    wp_register_script( 'title-tag-counter-script', get_template_directory_uri() . '/char-counter/js/title-tag.min.js', array( 'jquery' ), false, true );
    wp_register_script( 'description-counter-script', get_template_directory_uri() . '/js/description-tag.min.js', array( 'jquery' ), false, true );
}

// Enqueue scripts/styles.
add_action( 'wp_enqueue_scripts', 'wpse248829_enqueue_scripts' );
function wpse248829_enqueue_scripts() {
    // Load everywhere.
    wp_enqueue_style( 'style', get_stylesheet_uri() );

    // Probably not needed, because it was already specified as a dependency.
    // wp_enqueue_script( 'jquery' );

    // Only enqueue scripts/styles on static front page.
    if ( is_front_page() ) {
        wp_enqueue_script( 'character-counter-script-js' );
    }

    if ( is_page_template( 'tweet-template.php' ) ) {
        wp_enqueue_script( 'tweet-counter' );
    }

    if ( is_page_template( 'title-tag-template.php' ) ) {
        wp_enqueue_script( 'title-tag-counter-script' );
    }

    if ( is_page_template( 'description-tag-template.php' ) ) {
        wp_enqueue_script( 'description-counter-script' );
    }
}

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