How to call js in wordpress

How wordpress calls js

How wordpress calls js:

Generally, it is directly referenced in the theme's header.php file. Some themes will also load JS files through WP's own function wp_enqueue_scripts in the theme's functions.php file.

1. Directly introduce the file into the theme header.php file, such as

<script type=&#39;text/javascript&#39; src=&#39;http://www.jquery.com/js/jquery/1.10.2/jquery-1.10.2.min.js&#39;></script>

or

<script src="<?php echo get_template_directory_uri(); ?>/js/jquery/1.10.2/jquery-1.10.2.min.js"></script>

2. Introduce the file into the theme's functions.php file, such as

function my_enqueue_scripts() {
if( !is_admin ) { // 前台加载的脚本与样式表
// 去除已注册的 jquery 脚本
wp_deregister_script( 'jquery' );
// 注册 jquery 脚本
wp_register_script( 'jquery', get_template_directory_uri() . '/js/jquery/1.10.2/jquery-1.10.2.min.js', false, '1.0', false );
// 提交加载 jquery 脚本
wp_enqueue_script( 'jquery' );
 } 
} 
// 添加回调函数到 init 动作上
add_action( 'init', 'my_enqueue_scripts' );

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