Javascript console.log 未在 Chrome 浏览器中显示输出

console.log not showing output in Chrome browser

提问by zeeshan

I am using Chrome browser Version 52.0.2743.116 (64-bit) on Mac OSX 10.11.6.

我在 Mac OSX 10.11.6 上使用 Chrome 浏览器版本 52.0.2743.116（64 位）。

I have a chrome extension with a background.js where I have a console.log statement for debugging purposes. However, I am unable to see the output in the Chrome browser console. Alert works fine but console.log outputs nothing.

我有一个带有 background.js 的 chrome 扩展，其中有一个用于调试目的的 console.log 语句。但是，我无法在 Chrome 浏览器控制台中看到输出。警报工作正常，但 console.log 不输出任何内容。

alert("CSS code: "+css);
console.log("CSS code:"+css);

I have checked to make sure "All" messages are selected, the context is set to "top", etc. When the page loads, I see other console.log messages (not from my extension), the alert window pop up but nothing printed to the console.

我已经检查以确保选择了“所有”消息，上下文设置为“顶部”等。当页面加载时，我看到其他 console.log 消息（不是来自我的扩展），警报窗口弹出但什么也没有打印到控制台。

How do I see console.log output?

如何查看 console.log 输出？

EDIT:Adding the function code where the alertand console.logstatements appear.

编辑：添加alert和console.log语句出现的功能代码。

function doSomething(tab) {
    var tabUrl = tab.url;

        if (tabUrl && tabUrl.indexOf("my-site.com") != -1) {

            var css = "";

            if (hideAds == true) {
                css += ".adsBanner {display: none !important;} .promo {display: none !important;} ";
            }

            alert("CSS code: "+css);
            console.log("CSS code:"+css);

            chrome.tabs.insertCSS(tab.id, {
                code: css
            });

        }       
}

EDIT 2:In response to the comment that this is a duplicate of thisquestion, I want to print console.logstatements from the background file, I don't have a popup.html file. The other question has solutions to execute console.logon the background page called from the popup page.

编辑 2：为了回应关于这是这个问题的重复的评论，我想console.log从后台文件打印语句，我没有 popup.html 文件。另一个问题有console.log在从弹出页面调用的后台页面上执行的解决方案。

回答by zeeshan

This has been previously answered here. It seems the background.js has its own console window that needs to be watched (launched from the extension's inpsect view link under chrome://extensions).

这之前已经在这里回答过。似乎 background.js 有自己的控制台窗口需要观察（从 chrome://extensions 下的扩展程序的 inpsect 视图链接启动）。

回答by Adedolapo Dolexy Sokoya

The answer to your problem is to use document.write();

您的问题的答案是使用 document.write();