Enabling JavaScript in Browsers

Enabling JavaScript

All modern browsers come with built-in support for JavaScript, and it has enabled JavaScript by default. Frequently, you may need to enable or disable this support manually. This chapter explains how to turn JavaScript support on and off in your browsers: Chrome, Microsoft Edge, Firefox, Safari, and Opera.

JavaScript in Chrome

Here are the steps to turn on or turn off JavaScript in Chrome −

• Click the Chrome menu at the top right-hand corner of your browser.
• Select theSettingsoption.
• Click on thePrivacy and Securitytab from the left sidebar.
• ClickShow advanced settingsat the end of the page.
• Next, click on theSite Settingstab.
• Now, scroll to the bottom of the page, and find thecontentsection. Click on theJavaScripttab in the content section.
• Here, you can select a radio button to turn JavaScript on or off.

Also, you can add the URLS of the custom website to block and unblock JavaScript on particular websites.

JavaScript in Microsoft Edge

Here are simple steps to turn on or turn off JavaScript in your Microsoft Edge −

• Click Edge menu (three dots) at top right-hand corner of the edge browser.
• FollowMore Tools Internet Optionsfrom the menu.
• SelectSecuritytab from the dialog box.
• Click theCustom Levelbutton.
• Scroll down till you find Scripting option.
• SelectEnableradio button under Active scripting.
• Finally clickOKand come out.

To disable JavaScript support in your Microsoft Edge, you need to select Disable radio button under Active scripting.

JavaScript in Firefox

Here are the steps to turn on or turn off JavaScript in Firefox −

• Open a new tab typeabout: configin the address bar.
• Then you will find the warning dialog. SelectIll be careful, I promise!
• Then you will find the list ofconfigure optionsin the browser.
• In the search bar, typejavascript.enabled.
• There you will find the option to enable or disable javascript by right-clicking on the value of that optionselect toggle.
• If javascript.enabled is true, it converts to false upon clickingtoggle. If javascript is disabled, it gets enabled upon clicking toggle.

JavaScript in Safari

When you install the Safari web browser, JavaScript comes installed by default. If you have disabled it and want to enable it, follow the steps below.

• Click on thesafarimenu from the top-left corner.
• Select thepreferencesin the dropdown menu. It will open a new window.
• Open thesecuritytab.
• Check theEnable JavaScriptcheckbox in the web content section to enable the javascript. You can disable the JavaScript by unchecking the checkbox.
• Now, close thepreferencewindow and reload the web page.

JavaScript in Opera

Here are the steps to turn on or turn off JavaScript in Opera −

• FollowTools Preferencesfrom the menu.
• Select theAdvancedoption from the dialog box.
• SelectContentfrom the listed items.
• SelectEnable JavaScriptcheckbox.
• Finally, click OK and come out.

To disable JavaScript support in your Opera, you should not select theenable JavaScript checkbox.

JavaScript in Brave

The Brave is well-known for its security and privacy. So, It doesnt allow us to disable the JavaScript permanently, but we can disable the JavaScript for the particular website by following the below steps.

• Open the website URL to disable the browser for it.
• Now, Click on the Brave Shields icon in the address bar.
• Find theScriptsoption in the Shields panel.
• The default value of theScriptsis Allow Scripts. If you want to disable JavaScript, choose the “Block Scripts” option.

Warning for Non-JavaScript Browsers

If you have to do something important using JavaScript, then you can display a warning message to the user using<noscript>tags.

You can add anoscriptblock immediately after the script block as follows −

Now, if the user’s browser does not support JavaScript or JavaScript is not enabled, then the message from </noscript> will be displayed on the screen.