javascript - How to make "document.write" in an if statement work on the same html page rather than a new blank page?

Question

I want to use javascript document.write in an if statement. So far when I do this, it writes what is supposed to be in the document.write on a new blank page. I want to figure out how to make it so that the text that is supposed to be written is printed on the same page rather than a new blank page.

Answer 1

这与处于if语句中无关，它与document.write文档处于关闭状态时使用有关。然后使用它将打开一个要写入的新文档。没有办法解决这个问题。

使用DOM 操作而不是document.write.

Answer 2

Document.write只能在文档仍在加载时使用，因此之后任何尝试使用它都意味着它将写入新文档。

您需要设置元素的innerHTML。