For example, to add this JavaScript file to your home page, you might write the following:. In other words, it points to a file either in your website or on another website see the box on URL Types.
For example:. You can and often will attach multiple external JavaScript files to a single web page. For example, you might have created one external JavaScript file that controls a drop-down navigation panel, and another that lets you add a nifty slideshow to a page of photos.
In addition, you can attach external JavaScript files and add a JavaScript program to the same page like this:. The home page top includes a row of navigation buttons along the top—Men, Women, Kids, and so on—that, when moused over, reveal a panel of additional navigation options. For example, mousing over the Sports button circled in bottom image reveals a panel listing different sports that Nike makes products for. There are three types of paths: absolute path, root-relative path , and document-relative path.
All three indicate where a web browser can find a particular file. An absolute path is like a postal address—it contains all the information needed for a web browser located anywhere in the world to find the file. A document-relative path specifies the path from the web page to the JavaScript file. For example, suppose you have a JavaScript file named site.
Root-relative paths are good for JavaScript files stored on your own site. Because they always start at the root folder, the URL for a JavaScript file will be the same for every page on your website, even when web pages are located in folders and subfolders on your site. You can create an external JavaScript file, attach it to a web page, and then check the JavaScript in a web browser simply by opening the web page off your hard drive.
This book uses document-relative paths, which will let you follow along and test the tutorials on your own computer without a web server. Sometimes the order in which you attach external JavaScript files matters. The best way to learn JavaScript programming is by actually programming. The tutorial files are stored as a single Zip file. In Windows, download the Zip file and double-click it to open the archive. Click the Extract All Files option, and then follow the instructions of the Extraction Wizard to unzip the files and place them on your computer.
If you have trouble opening the Zip file, the free 7-Zip utility can help: www. On a Mac, simply double-click the file to decompress it. To get your feet wet and provide a gentle introduction to JavaScript, your first program will be very simple:. In your favorite text editor, open the file hello. It informs the web browser that the stuff following this tag is JavaScript. Press the Return key to create a new blank line, and type :.
The JavaScript alert function is a command that pops open an Alert box and displays the message that appears inside the parentheses—in this case, hello world. The code should now look like this :. In this example, the stuff you just typed is shown in boldface. The two HTML tags are already in the file; make sure you type the code exactly where shown. Launch a web browser and open the hello.
A JavaScript Alert box appears see Figure Notice that the page is blank when the alert appears. Double-check your typing and read the following Tip. For new programmers, the most common cause of nonfunctioning programs is simple typing mistakes.
Always double-check to make sure you spelled commands like alert in the first script correctly. Also, notice that punctuation frequently comes in pairs the opening and closing parentheses, and single-quote marks from your first script, for example.
So when you try to preview the tutorial files for this book in Internet Explorer, you might see a message saying that IE has blocked the script. This annoying behavior only applies to web pages you preview from your computer, not to files you put up on a web server.
The script in the previous section popped up a dialog box in the middle of your monitor. What if you want to print a message directly onto a web page using JavaScript? In your text editor, open the file hello2. Like the alert function, document. The tutorial files you downloaded also include the completed version of each tutorial.
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You can try to remove the local content and reinstall the game on Steam:. Repeat the process until you have all the desired games installed. You can restart the Steam client to play games on your PC again.
Besides knowing remarkably efficient ways for lost Steam games recovery, you should also acquire reliable ways for backing up Steam games. You can always survive whenever you lost Steam games or local saved game files including recordings, screenshots, etc. Two reliable tips will help you fully back up Steam games and related game files on your own. Let's see the details:. Check the box in front of the games that you wish to backup, and click "Next" to continue.
Select the location to save your Steam games backup and click "Next" to continue. If you want to specify another location for saving the games, click "Browse" to choose a new location.
Step 4. You can rename the backup files or keep the default generated name, and click "Next" to continue. Wait until the backup operation finishes. The backup speed is based on the size of your selected games. Don't forget to back up your saved files of Steam games on your local drive. To do so, you should first learn what files need to be backed up on your PC?
You need now specify another secure drive or an external hard drive to continue the backup process. After this, you can manually copy each folder one by one the target device or use reliable file backup software such as EaseUS Todo Backup to fully backup all files at one time. Choose the system, disk partition, files or apps that you want to back up. Then click "Browse" to select a destination where you want to store the backup file.
Store Download Support Live Chat. A brief guide on how to restore Steam missing downloaded files : Open Steam and click on the Library button at the top of the window. Workable Solutions Step-by-step Troubleshooting Fix 1. Restore from Steam library Open the Steam game player and go to Library.
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