未捕获的TypeError：无法读取未定义的属性“填充”

Question

我无法理解，因为当我包含一些javascript代码，仅用于测试Magento中的某些内容时，会返回以下错误：

df <- data.frame(x = 1:5,
                 Department = paste0("Store", 1:5),
                 Department2 = paste0("IT", 1:5))

dep_col <- names(df)[-1]

for (c in dep_col)
  df[[c]] <- paste(c, df[[c]], sep = "_")

任何人都可以举例说明测试代码应该如何？

这是我测试的代码：

Uncaught TypeError: Cannot read property 'fill' of undefined
at klass.onComplete (ceramic-sinks.html?p=1&dir=asc&limit=21&mode=grid&order=position&cat=205:4525)
at klass.<anonymous> (ezzoom.js:2)
at prototype.js:1
at klass.<anonymous> (ezzoom.js:2)
at prototype.js:1