Adding Custom JavaScript

Adding Custom JavaScript — a practical guide to WordPress plugin JavaScript with clear examples you can reuse in real projects.

WordPress Plugin Development Series (16/95). Prefer one article? Read the complete WordPress plugin development tutorial.

Short description

Localize AJAX URLs and nonces for front-end scripts. Keep JS modular as features grow.

Localize script

wp_localize_script('acme', 'AcmeData', [
    'ajaxUrl' => admin_url('admin-ajax.php'),
    'nonce'   => wp_create_nonce('acme_ajax'),
]);