opera extensions simple notepad save url

You cannot reference a variable outside of the block it's declared in, a ReferenceError gets thrown.Make notes and sync them. In this case, the curly brackets of the if/else statements. A block is anything between curly brackets ().

Variables with the const and let keyword are block-scoped. Next: JavaScript : Variables, Constants, Data Type and Reserved WordsĬonst message = 'Sorry, you're too young.' Ĭonst message = 'Yay! You're old enough!' This is the last statement tells the browser the end of the script ( here it is JavaScript) The above part is a JavaScript command ( document.write() ) which writes text ( here it is 'First JavaScript') to a web page. The above statement is the opening script tag tells the browser to expect a script (here it is JavaScript) instead of HTML. The first nine and last three lines are HTML codes.Įverything except the code written and tags is html. We have already learned the JavaScript syntax, the tools to create scripts and how to enable JavaScript in the browser. Click the Back button to return to the previous page, and then click the Reload button to run scripts. Click to select the Enable JavaScript check box, and then click OK.Ĥ. Select the checkbox next to 'Enable JavaScript'.ģ.

Select the checkbox next to 'Enable JavaScript' and click OK.Ĥ. Choose 'Web Features' from the left navigation.Ĥ. Under 'Active Scripting', select 'Enable' and click OK.ģ. Scroll down until you see a section labeled 'Scripting'.Ħ. To view your web pages you need a browser like firefox, opera, internet explorer etc.ĥ. Therefore at the time of saving the HTML document files, we must mention. txt, if you do not mention another extension.

An important factor to remember that Windows Notepad saves files with an extension of. Initially, it will be best to write the code by hand in a simple text editor rather than use advanced tools. There are lots of good tools in the market for developing a web-based application like Macromedia's Dreamweaver. For windows environment, you can use Windows NotePad and for Mac OS X, the TextEdit application is usable.

To create a JavaScript code for web applications you need a simple text editor.

Opera extensions simple notepad save url