How do you prevent your JavaScript from being displayed by older browsers?

How do you prevent your JavaScript from being displayed by older browsers?

The first chapter of the book says to use the following format to support older browsers that don’t support JS. What it actually does is simple, it uses HTML comment tag to hide script from browsers that don’t support JS.

How do you hide JavaScript code from browsers that don’t run it?

The only rule to hiding JavaScript code with an HTML comment is that there must be a line break after the — that opens the comment. Remember that this functions as a JavaScript comment, and comments out the remainder of the line. So the JavaScript interpreter won’t run any code that follows it.

How can JavaScript code be hidden from old browsers that don’t support JavaScript?

HTML comment. Old browsers will treat your JavaScript code as one long HTML comment. On the other hand, new JavaScript-aware browsers will normally interpret the code between the tags </b> and (the first and last lines of the code will be treated by the JavaScript interpreter as one-line comments).

Are comments are used to hide JavaScript from old browsers?

Text inside the comments is ignored by browsers and thus is not displayed on the webpage. To end a comment, we use –>. Thus any JavaScript code (line 3 above) placed inside the HTML document is ignored.

How do I know if JavaScript is working?

  1. go to Tools.
  2. then Internet Options…
  3. select the Security tab.
  4. press the Custom Level button.
  5. scroll down to Scripting.
  6. enable Active Scripting.

Are action that can be detected by JavaScript?

Explanation: The JavaScript navigator object is used for browser detection. It can be used to get browser information such as appName, appCodeName, userAgent etc. window.

Can JavaScript code be hidden?

As other have said, there is no way to protect javascript intended to run in a browser from a determined viewer. If the browser can run it, then any determined person can view/run it also.

How do I hide my front end code?

Front end Javascript is interpreted by the browser, so in order to hide it, you would have to include some kind of utility to allow the browser to still make use of that code, which kind of defeats the purpose. The only way I could see it work would be in an intranet where the users are known.

Which browsers do not support JavaScript?

All the modern browsers come with built-in support for JavaScript. Frequently, you may need to enable or disable this support manually. This chapter explains the procedure of enabling and disabling JavaScript support in your browsers: Internet Explorer, Firefox, chrome, and Opera.

Which was the first browser to supported JavaScript?

Netscape is the first browser to support JavaScript among all the other web browsers.

What is the correct JavaScript syntax to write Hello World?

The correct answer to the question is “What is the correct JavaScript syntax to write “Hello World” is option (a). document. write(“Hello World”). This JavaScript command prints everything that is typed in between the parenthesis.

Do scripts go in the head or body?

Place normal script in the head unless it becomes a performance/page load issue. Place script that impacts the render of the page at the end of the body.