javascript - How to monitor browser refresh, close, and back behavior on PC?

How to monitor browser refresh, close, and back behavior on PC? Then pop up the custom layer? I have tried onb...

From [JavaScriptdiscussion group] 2017-07-05 10:56:28 0  1  1103

javascript - The first parameter of setTimeout is to execute the function immediately, I can't understand it

The first parameter of setTimeout is to execute the function immediately. I can’t understand it. {Code...} Alt...

From [JavaScriptdiscussion group] 2017-07-05 10:56:26 0  9  1001

javascript - Questions about tostring conversion

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [JavaScriptdiscussion group] 2017-07-05 10:56:24 0  4  886

javascript - vue problem of dynamically changing WeChat sharing copy

Now there is a requirement. When I share on the home page, the title is aaaa. When I share on the details page...

From [JavaScriptdiscussion group] 2017-07-05 10:56:20 0  3  1301

javascript - Questions about context, that is, what this points to?

Go directly to the code: {code...} What is the reason why this points to different points in the above code? I...

From [JavaScriptdiscussion group] 2017-07-05 10:56:18 0  5  910

javascript - What are the practical and specific uses of JsDoc?

If you want to understand the actual phenomenon and the functions brought by JSDoc, for example, this file: ht...

From [JavaScriptdiscussion group] 2017-07-05 10:56:16 0  1  800

javascript - react project attachment upload plug-in

Do you have any useful react attachment upload plug-ins at work? Recommend one

From [JavaScriptdiscussion group] 2017-07-05 10:56:14 0  1  810

Array object Unexpected identifier - Stack Overflow

The problem is as shown in the picture. I don’t understand why the program displays undefined? The console rep...

From [JavaScriptdiscussion group] 2017-07-05 10:56:12 0  1  880

javascript - What is app shell? What are the standard definitions or learning materials or usage?

When looking up relevant information about pwa and vue-ssr, this term was mentioned repeatedly, but there are ...

From [JavaScriptdiscussion group] 2017-07-05 10:56:10 0  1  985

javascript - Vue's embarrassing problem of waiting for backend data

Everyone must know that the spa developed with Vue uses asynchronous requests to obtain data. Now I want to ad...

From [JavaScriptdiscussion group] 2017-07-05 10:56:08 0  3  903

javascript - I made an h5 canvas game, using requestanimation to control direction movement, and keys to control whether to press the direction keys, but it's a bit stuck. Could you please tell me how to optimize it?

I can’t type out the exact code. Is there any expert who can provide valuable advice?

From [JavaScriptdiscussion group] 2017-07-05 10:56:06 0  4  910

javascript - How to use regular expressions to match ids after special symbols

str = 'http://1dwen.cn/index.php/bra...'; How to get 2 from this string;

From [JavaScriptdiscussion group] 2017-07-05 10:56:03 0  4  1042

javascript - How does the front end implement cutting and uploading part of an image? How about uploading via WeChat or QQ? What technology is used?

How does the front end implement cutting and uploading part of an image? How about uploading via WeChat or QQ?...

From [JavaScriptdiscussion group] 2017-07-05 10:55:59 0  3  1035

javascript - Why can't double-layer traversal be implemented in the controller in angular?

I need to implement this function, traverse the obtained data to one level, and then traverse each item, and a...

From [JavaScriptdiscussion group] 2017-07-05 10:55:57 0  1  852

How to manually trigger breakpoints in Javascript code?

When debugging the packaged code of the Vue project in Google Chrome, it is difficult to locate the place wher...

From [JavaScriptdiscussion group] 2017-07-05 10:55:55 0  2  750