Remove polyfills, T-14767

.jshintignore

@@ -5,7 +5,6 @@ gulp/*.js
 gulp/*/*.js
 js/prod/*.js
 js/dev/*.js
-js/src/legacy.js
 js/src/modules/lazyload.js
 js/src/modules/sticky-nav.js
 js/src/modules/navigation.js

README.md

@@ -218,10 +218,6 @@ All .js files in `/js/src/*` is built to production bundles in `/js/prod/` folde
 
 If you want to add a piece of custom JS, create a file under `/js/src/modules/` and import or require it in `/js/src/front-end.js`. If you need a admin-specific JS, add a `/js/src/admin.js` and then enqueue `/js/dist/admin.js` with `enqueue_admin_scripts`
 
-#### Legacy support
-
-Our build uses babel to translate scripts to ES2015 compatible JS, so you can use modern JS syntax without thinking about backwards compatibility. There is a `/js/src/legacy.js` file, which contains the needed polyfills for browsers not supporting the ES2015 syntax and is automatically loaded on the header when such browser is detected.
-
 #### Linter
 
 We use [Airbnb](https://github.com/airbnb/javascript) es-lint presets spiced up with our own flavors.

inc/hooks.php

@@ -29,7 +29,6 @@
  * Scripts and styles associated hooks
  */
 require get_theme_file_path( 'inc/hooks/scripts-styles.php' );
-add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_polyfills' );
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_theme_scripts' );
 
 // NB! If you use ajax functionality in Gravity Forms, remove this line

inc/hooks/scripts-styles.php

@@ -61,34 +61,6 @@ function enqueue_theme_scripts() {
   wp_localize_script( 'scripts', 'air_light_externalLinkDomains', THEME_SETTINGS['external_link_domains_exclude'] );
 } // end air_light_scripts
 
-/**
- * Load polyfills for legacy browsers
- */
-function enqueue_polyfills() {
-  // Include polyfills
-  $script = '
-  var supportsES6 = (function () {
-  try {
-    new Function("(a = 0) => a");
-    return true;
-  } catch (err) {
-    return false;
-  }
-  }());
-  var legacyScript ="' . esc_url( get_theme_file_uri( get_asset_file( 'legacy.js' ) ) ) . '";
-  if (!supportsES6) {
-    var script = document.createElement("script");
-    script.src = legacyScript;
-    document.head.appendChild(script);
-  }';
-
-  if ( file_exists( get_theme_file_path( get_asset_file( 'legacy.js' ) ) ) ) {
-    wp_register_script( 'air_light_legacy', '', [], filemtime( get_theme_file_path( get_asset_file( 'legacy.js' ) ) ), false );
-    wp_enqueue_script( 'air_light_legacy' );
-    wp_add_inline_script( 'air_light_legacy', $script, true );
-  }
-} // end enqueue_polyfills
-
 /**
  * Returns the built asset filename and path depending on
  * current environment.