Is it possible to use Javascript to list all the files contained in a subfolder?
I have a bunch of images that need to be linked too, but I would like it to be dynamic because the list will be changing a lot.
Thankyou!!!
Is it possible to use Javascript to list all the files contained in a subfolder?
No. You would usually set up a simple server side script that does the listing (e.g. using PHP's glob()), and output a JSON array, for example.
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I want to create and manipulate several HTML files with JavaScript and NodeJS. The usual way to update HTML files is to include an update script at the top, but I want to create multiple HTML files with one JS file. I have a list with the necessary data to process. It contains the names for the HTML files and the data to put in.
My idea was to use a model.html file, which contains the data, that will be included in all of the files. This model file will be copied and renamed to the necessary file. Then I want to load it with a NodeJS module or any other way fit, so it will be recognized as "document" as if the script was included in the file. Then I want to manipulate it with plain JS. A for loop should iterate through the list and create the file, load it as "document", manipulate it and then go to the next file.
Is this possible?
If you want to just parse the HTML and get the document and operate on it you can check https://cheerio.js.org/
If you want to execute the Javascript also then you need to use Headless browsers like Headless Chrome
I am building a application for the first time in node.
My website will include a static list of countries, music genres and so on...
Should I store the data in my database, or should I use a static json file with a list(countries, genre)?
My folder structure looks something like src\lib..scsss..server and so on.
My question ultimately is - Is there a best practice for storing static lists in node - if a josn file is preferred where should this exist in my folder structure?
If your data is not gonna change and static, then you should use file system which will have high R/W operation rate compared to communication with DB Server overhead.
Moreover you can use filecache to cache all your static files. Which will load the files even faster.
The answer is really that "it depends" upon some things you have not specified.
First off, if it is a list of data that does not change while your app is running (or changes very infrequently), then you don't want to load it from some remote source every time you need it. You will want to load it once and then keep that list in memory for subsequent use. This will be a lot more efficient for your server.
As to where to store the list in the first place, you have several choices that depend upon who is going to maintain that list and what level of programming skill they might have.
If the list of countries will not change often and will be maintained by a Javascript developer, then you can either put the list right into a Javascript literal in your code or in a JSON file in your file system. If choosing the latter option as a JSON file, it can be in the same directory as your Javascript source files and just loaded directly with require() upon startup.
If the list of countries will be maintained by someone who is not a Javascript developer, but can be trusted to follow JSON syntax rules, then you can put the list in a JSON file. Whether you put this file in the same directory as your JS files or in a separate data directory really depends more upon how your application is deployed, who has permission to do what, etc...
If the list of countries will be maintained by someone who has no idea about programming or syntax rules and should be modifiable completely independently from your code, then you may want to either put it in the database and build some sort of admin interface for modifying it or put it in a plain text file (one country per line) and then parse that file upon app startup.
What is the javascript equivalent to PHP's include(file.html) specifically without needing to place it in a div like $("#div").load("file.html");? I'd like to get away from using PHP and find out how to do this in Javascript without using a div placeholder and just loading it into webcode to use with things like bootstrap modals or buttons.
in this case, php acts as a preprocessor - it sees that include line, fetches the html and then drops the contents of the file in-place. Javascript can't really do that in the same way because it only lives on the browser.
You have some options
Do you an http request to a resource that will return the html, and then render that html string to a location (html id tag of some sort)
Use a different preprocessor. There's loads and it depends on what runtime you're on. NodeJS? Ruby? Go? Java? Python? All of them use something different - but they'll give you a one-to-one alternative for the directives you want to use inside your html files. Here's a great article that gives an overview of a number of different options: https://css-tricks.com/the-simplest-ways-to-handle-html-includes/
naturally, when you want to load a resource from js (when it is possible and do not try to access a resource that triggers a cross domain origin problem) you use AJAX
a simple implementation using jQuery:
$.get('file.html', function(file) {
console.dir(file);
});
I'm thinking of doing some online file manipulation for mobile users, the idea being that the user provides a URL to the file, then the file contents are modified by the JS, and can then be downloaded. But I haven't been able to figure out how to get the file when it's on a separate domain using just JS.
Is this possible? If so any hints or examples would be appreciated.
Just wanted to add that part of what I wanted to do was make it available without my hosting it. I'm thinking of something like a a file they can host somewhere,and then all of the bandwidth is their own...and that of wherever they are getting the file from of course.
The only way to load contents of a file on another domain is from within a <script> tag. This is how JSONP works. Look into getting your target file into this format.
The other way would be to use a local proxy. Create a web service method that loads and returns the contents of the file, then call that locally using your favorite JavaScript framework.
Depending on how you think of public webservices, and within some limitations I'm still mapping, you can do this using an ajax call to YQL, like so.
(will expand the answer later).
http://query.yahooapis.com/v1/public/yql?q=select%20%2a%20from%20data.uri%20where%20url=%22http://t3.gstatic.com/images?q=tbn:ANd9GcSyART8OudfFJQ5oBplmhZ6HIIlougzPgwQ9qcgknK8_tivdW0EOg%22
One of the limitations of this method is file size, it currently tops out at 25k.
Hi,
For my project I m using jquery bulit in photo slide show,jquery code is taking images from array and displaying the images..The problem is I have a lot of images which I don't want to put it in Array(because it need manual effort) instead of that I want to read each image from the folder and display the images. the advantage of doing so is whenever you want to add more images you need to drop it in folder since you are reading images from folder so need not to do any thing in code level.so it makes your work easier and simpler.. so is there any way to achieve the same using javascript?.
Thanks in Adavance.
Javascript being client-side, it's possible to list the content of a server directory with it. You'll need some server side scripting to do that, like PHP.
see this SO question for an example
I think you should add an Ajax request to get the names of file in the directory.
After you can just pass along the array and show only those images in the slideshow.