我可以创建一个按钮来启用javascript吗

Question

Is there any way to create a button to enable javascript if a user doesn't have it enabled?

If not, is there another way to enable javascript in the user's browser automatically when they visit our website?

Failing that, can I access the user's browser settings with permission and then enable javascript?

Answer 1

No.

If a user has disabled JavaScript then there is no way for a website to do anything (other then provide instructions (eg in <noscript> )) to "help" them turn it on.

Given that people disabling JS are, increasingly, using third party tools (such as NoScript) to do so, providing instructions isn't likely to be helpful anyway. If a user has disabled JavaScript, then it is safe to assume that they understand the consequences of doing so and are capable of finding the On switch for themselves.

JavaScript can fail for other reasons though (such as a network problem while the JS file was downloading), so always be progressive and unobtrusive .

Answer 2

Have you considered using a <noscript> tag?

<noscript>
     <div class="bigRedWarningBoxInMiddleOfScreen">
        Enable javascript pretty please
      </div>
</noscript>

Answer 3

不，如果网页可以控制浏览器的安全性设置，那我们就该死了！

Answer 4

The only thing you can do is to check if JavaScript is disabled. If it is you can show a page that guides the user with enabling it.

Answer 5

No but next best thing you could do is:

<noscript>
    <div class="alert alert-error">Please enable JavaScript to use this site properly, here's <a href="http://www.enable-javascript.com/" target="_blank">how</a></div>
</noscript>

I believe that site detects which browser the user is using and gives directions accordingly.

Some people don't like noscript for some reason so you could do:

<div id="noscript">
    <div class="alert alert-error">Please enable JavaScript to use this site properly, here's <a href="http://www.enable-javascript.com/" target="_blank">how</a></div>
</div>

and

document.getElementById('noscript').style.display = 'none';

But this might cause a flicker if your page size is large.