mediawiki.action.edit.preview: Disable if there is no #wpTextbox1

ProofreadPage has custom editforms for Index pages, which are not
supported by the API. These editforms have no #wpTextbox1, so disable
live preview in that case.

Bug: T78709
Change-Id: I90cba79e5a4a756454741c4070ebdf620520ab55

diff --git a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
index 3bf8e32..84bde7d 100644 (file)
--- a/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
+++ b/resources/src/mediawiki.action/mediawiki.action.edit.preview.js
@@ -205,7 +205,8 @@
        $( function () {
                // Do not enable on user .js/.css pages, as there's no sane way of "previewing"
                // the scripts or styles without reloading the page.
-               if ( $( '#mw-userjsyoucanpreview' ).length || $( '#mw-usercssyoucanpreview' ).length ) {
+               // Do not enable for ProofreadPage Index page editors, which have no textbox
+               if ( $( '#mw-userjsyoucanpreview' ).length || $( '#mw-usercssyoucanpreview' ).length || $( '#wpTextbox1' ).length === 0 ) {
                        return;
                }