Line numbers: Fixed TypeError when lineNumberWrapper is null (#2337)

If a code block doesn't contain code, line numbers will not be added but the resize event still expected them to be there resulting in a TypeError.
PrismJS · Apr 29, 2020 · 4b61661 · 4b61661
1 parent 053016e
commit 4b61661
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diff --git a/plugins/line-numbers/prism-line-numbers.js b/plugins/line-numbers/prism-line-numbers.js
@@ -27,6 +27,9 @@
 		if (whiteSpace === 'pre-wrap' || whiteSpace === 'pre-line') {
 			var codeElement = element.querySelector('code');
 			var lineNumbersWrapper = element.querySelector('.line-numbers-rows');
+			if (!codeElement || !lineNumbersWrapper) {
+				return;
+			}
 			var lineNumberSizer = element.querySelector('.line-numbers-sizer');
 			var codeLines = codeElement.textContent.split(NEW_LINE_EXP);
 

diff --git a/plugins/line-numbers/prism-line-numbers.min.js b/plugins/line-numbers/prism-line-numbers.min.js