How to turn on javascript in browser

With the continuous development of Internet technology, Javascript has become one of the necessary technologies for modern web development. Turning on Javascript in the browser allows users to better browse and use web pages. This article will introduce how to turn on and enable Javascript, and how to check whether the current browser supports Javascript.

1. How to open and enable Javascript

1. Open and enable Javascript in Chrome

The Chrome browser has Javascript enabled by default and does not require any settings. . If you need to manually enable or disable Javascript, you can follow the steps below:

a. Enter chrome://settings/content/javascript in the address bar of the Chrome browser and press the Enter key.

b. Select the "Allow all websites to run JavaScript" option in the Javascript area.

c. If you need to disable Javascript, you can select the "Do not allow websites to run JavaScript" option.

2. Open and enable Javascript in Firefox

Firefox browser has Javascript enabled by default and does not require any settings. If you need to manually enable or disable Javascript, you can follow the steps below:

a. Enter about:config in the address bar of the Firefox browser and press Enter.

b. Enter javascript.enabled in the search bar and press Enter.

c. Set the value of javascript.enabled to true to enable Javascript. If you need to disable Javascript, you can set the value to false.

3. Open and enable Javascript in Safari

Safari browser has Javascript enabled by default and does not require any settings. If you need to manually enable or disable Javascript, you can follow these steps:

a. Select "Preferences" in the menu bar of the Safari browser.

b. Check the "Enable JavaScript" option in the "Security" tab.

c. If you need to disable Javascript, you can uncheck the "Enable JavaScript" option.

4. Turn on and enable Javascript in Edge

Edge browser has Javascript enabled by default and does not require any settings. If you need to manually enable or disable Javascript, you can follow these steps:

a. Select "Settings and More Options" in the menu bar of the Edge browser.

b. Select "Cookies and Site Permissions" in the "Privacy and Services" tab.

c. Select "Allow" under "JavaScript" to enable Javascript. If you need to disable Javascript, you can select "Block".

2. How to check whether the current browser supports Javascript

Before using Javascript, you need to check whether the current browser supports Javascript. You can check in the following two ways:

1. Use Javascript code to check

You can enter the following Javascript code in the browser console:

if (typeof window !== 'undefined') {
alert('The browser supports JavaScript!');
} else {
alert('The browser does not support JavaScript!');
}

2. Use the web page to check

You can open the following web page to check:

http://www.whatismybrowser.com/detect/is-javascript-enabled

If the page displays "is true", it means that the current browser supports Javascript.

3. Summary

Turning on and enabling Javascript in the browser can allow users to better browse and use Web pages. Different browsers have different settings, but most browsers have Javascript enabled by default. Therefore, no additional setup is usually required. Before using Javascript, you need to check whether the current browser supports Javascript. This can be checked via Javascript code or web pages.

The above is the detailed content of How to turn on javascript in browser. For more information, please follow other related articles on the PHP Chinese website!