在“网络设置”屏幕的标题中打印JavaScript。
原型
network_settings_add_js()
源文件
路径:wp-admin/includes/ms.php
<?php
...
function network_settings_add_js() {
?>
<script type="text/javascript">
jQuery(document).ready( function($) {
var languageSelect = $( '#WPLANG' );
$( 'form' ).submit( function() {
// Don't show a spinner for English and installed languages,
// as there is nothing to download.
if ( ! languageSelect.find( 'option:selected' ).data( 'installed' ) ) {
$( '#submit', this ).after( '<span class="spinner language-install-spinner is-active" />' );
}
});
});
</script>
<?php
}
...
?>
其他
英文文档:https://developer.wordpress.org/reference/functions/network_settings_add_js/