Scripts can be placed in the <body> , or in the <head> section of an HTML page, or in both.
The practice of putting the outside of the <html> comes from an advice to place the script after all content or on the bootom of the page (done correctly placed before BODY end tag) in order to execute script only after page is loaded and all content is available, mitigating the need for other document ready solutions.
The basic idea is to move the script that you want to execute into an external file and create a script tag when you get your Ajax response. You then set the src attribute of your script tag and voila, it loads and executes the external script.
If you go to the sources tab in Chrome, you’ll see the a list of domains. Search for your own domain, for example ‘localhost’. If you open the map, you’ll see all folders and files that are loaded into your current page. You’ll also see all other domains where you’ve used files (like JS, CSS, images, etc.)
The old approach to solving this problem was to put <script> tags at the bottom of your <body> , because this ensures the parser isn’t blocked until the very end. This approach has its own problem: the browser cannot start downloading the scripts until the entire document is parsed.
1. Place the script Tag at the Bottom of the Page. When you place the script tag at the bottom of the page after the main content, there will be some performance improvement. The content of the page will load and get parsed, as there is no blocking behavior for rendering HTML since you have placed the script in the end …
The proper way to get access to current script is document. scripts (which is array like HTMLCollection ), the last element is always current script because they are processed and added to that list in order of parsing and executing. var len = document. scripts.
Open Notepad or TextEdit, open the template folder, then drag the . js file into Notepad or TextEdit and drop it. Open Notepad or TextEdit, select “file” then “open”, browse to the template folder, select “all file types” and open the . js file that way.
To select a <select> element, you use the DOM API like getElementById() or querySelector() . How it works: First, select the <button> and <select> elements using the querySelector() method. Then, attach a click event listener to the button and show the selected index using the alert() method when the button is clicked.
Open DevTools (F12) Go to sources tab. Open Search All Files by pressing ctrl + shift + f (Win) or cmd + option + f (Mac)
Windows 7/8: C:\Users[USERNAME]\AppData\Local\Google\Chrome\User Data\Default\Cache. Mac OS X: /Users/[USERNAME]/Library/Caches/Google/Chrome/
Press Command+Option+J (Mac) or Control+Shift+J (Windows, Linux, Chrome OS) to open the Console, right here on this very page.
It’s always a good practice to add jQuery code in footer i.e. just before the closing </body> tag. If you have not done that, then use the defer attribute. The defer attribute is used to specify that the script execution occurs when the page loads.
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