回答編集履歴

間違いの修正

2019/05/09 16:35

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test CHANGED Viewed

@@ -64,7 +64,7 @@
-       //mdownですでに宣言済みなので不要-> dragObj.addEventListener("mouseup", mup, false);
+        dragObj.addEventListener("mouseup", mup, false);
         document.body.addEventListener("mouseleave", mup, false);