Does HTML support splitting source over multiple files? I'm looking for some equivalent of C++'s #include; or maybe something like C#'s partial; an element that could take source path and inject the file contents at that place.
Apologies if this has been asked before. Google and SO searches didn't return much. I'm not a web guy, but the only solution I found was using an iframe, which many people do not like for various reasons.
It is just that my html source is becoming huge and I want to manage it by splitting into multiple files.
You can't, at least not in flat-HTML. What you can do is using Javascript to load and place the snippets. iframes are also non-ideal because contrary to what happens with directives like #include and partial, those snippets will never be compiled in one single page.
However, I think it's important here to understand how your pages will be served. Is this a static website? Because in this case I would write a simple script in your language of choice to compile the page. Let's say that you have a base like this:
<html>
<head>
<!-- ... -->
</head>
<body>
{{ parts/navigation.html }}
<!-- ... -->
</body>
</html>
You could write a script that runs through this file line by line and loads the content into a variable named, for example, compiled_html. When it finds {{ file }} it opens file, reads its content and append it to compiled_html. When it gets to the end, it writes the content of the variable into a HTML file. How you would implement it depends on the languages you know. I'm sure that it's pretty straightforward to do it in C#.
This way you'll be able to split the source of your HTML pages into multiple files (and reuse some parts if you need them), but you'll still end up with fully functional single files.
It is easily possible, if you are running PHP:
The PHP Language has the "include" command built in.
Therefore you can have your "index.php" (note you have to change the suffix, for the PHP parser to kick-in) and simply use following syntax.
<html>
<head>
[...] (header content you want to set or use)
</head>
<body>
<?php
include "relative/path/to/your/firstfile.html";
include "relative/path/to/your/secondfile.html";
include "relative/path/to/your/evenwithothersuffix/thirdfile.php";
include "relative/path/to/your/fourth/file/in/another/folder.html";
?>
[...] (other source code you whish to use in the HTML body part)
</body>
</html>
Basically making you main index.php file a container-file and the included html files the components, which you like to maintain seperately.
For further reading I recommend the PHP Manual and the W3Schools Include Page.
not possible with static html.
in general, this problem (lazy-fetching of content) is solved with a template processor.
two options:
template processor runs on the server side
any language
static website generators, server side rendering
template processor runs on the client side
javascript
web frameworks
Related
I'm trying to use an HTML template as a frame, and want to load the content inside of it depending on the route.
I'm used to PHP, so I know the require($file) option embeded in the code so it will render the needed file inside of the template, so I'd like to know if there is any thing similar to it.
I've tried to search about it, but it isn't that clear. So I've thought in two options, the first one is to split the template in two parts, and put the file content in between these two when sending the response.
This is what I am aiming for in the main HTML file and be able to render it in the NodeJS response.
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>My App</h1>
{ require($file); }
</body>
</html>
Easy way is to read the template (with some placeholders for the variable text) into a variable. Then read the text that you want to put into the placeholders into another variable. Then just replace the placeholders. Output the final string.
You can use https://www.npmjs.com/package/mustache to render templates in node - it includes partial HTML templates and should feel familiar to your PHP experience.
(Just to answer you question directly - no, HTML by itself is static, and with exception of iframe, there is no safe way to include partial HTML within another HTML page.)
you can use the iframe HTML object to embed it inside your file
<iframe src="<source html file location>"></iframe>
No. There's no way to add a 'variable' in HTML since HTMl it static. You need a dynamic language for that such as:
mustache.js
handlebars.js
pug/jade
Or if you're feeling really passionate about web development, and you are willing to begin hating html, then you should defiantly check out:
react.js Personal Favorite
angular
Let me know if you have any questions!!
Okay, my english is not the greatest so I apologize in advance. Question is really stupid and I dont know how that is called but I will try to explain it here better. So I am making a template for one restourant and menus are changing every week. So is it possible to write paragraphs somewhere else ( in separated place (external or internal)) and then "call them" somewhere in .html.
Example. making methods in C# and then calling them anywhere when we want to
In my opinion the simplest method will be to use php.
Then in place with menu you can only use something like this:
<?php inlcude('menus/file.php');
And on server create a folder menus where you wil put php files with html.
All files can be simple html. There is no need to learn php just in place you want to call a file use code i placed earlier.
HTML doesn't have a good way to achieve this (although iframe exists).
This sort of thing is generally handled by software that generates the HTML, either when the page is requested (via something like the very basic SSI support in some webservers to full on server side programming (which you could use C# for)) or at publication time (via a build tool such as Gulp).
You could use jQuery to achieve it (if it is a simple website and simple menu), read more the related function on http://api.jquery.com/load/
You may also read a simple here: HTML File including another HTML file
I may also include a very basic example for you
main.html
<body>
<header>Some header</header>
<content>
<main class="the-menu"></main>
</content>
<script>
$(".the-menu").load("menu.html");
</script>
</body>
First time making a webpage in html. I have an assignment to format a bunch of text using appropriate html tags. No problem. But I would like to clean up my code by storing the paragraphs in a separate file. I have been searching for hours and cannot find anything.
Bottom line what I want to do:
have a file: strings.{html/xml/php/js}
and access variables from that file in my page index.html doing something like this:
<p>$someVarName</p>
This seems like a bit of a strange 'optimization', one that is not usually made, at least as far as I understand the question.
What you can do is have a JavaScript file e.g. script.js, and reference it in your index.html file:
<script language="javascript" type="text/javascript" src="script.js"></script>
In script.js you can insert custom HTML as such:
document.getElementById('tag-id').innerHTML = '<p>some text</p>';
To reduce the page load time of a website in the browser usually one tries to deliver one HTML file per page and one compact CSS/JS/image/SVG file for the whole website. All files are usually aggregated server side from multiple resources as you like to do.
Here are some common ways to enrich HTML pages and their creation process:
Using an iframe you can let the browser import and display another page using a single HTML tag but this is not recommended because it complicates layouting and a content's URL is not visible to the user in the browser's address bar.
Using PHP you could have an index.php with the contents of your index.html plus some PHP snippets printing variables from an included variables.php. PHP requires server side execution which is typically implemented using Apache2 webserver. A PHP script, index.php, would be executed each request / each time a user accesses the page.
index.php
<html>
<?php require_once 'variables.php'; ?>
...
<?php print $property1; ?>
<?php print $property2; ?>
</html>
variables.php
<?php
$property1 = 'value 1';
$property2 = 'value 2';
?>
Using XSLT you can transform the HTML as XML. This requires the HTML formatted as well-formed XML. XSLT can be executed both client and server side. XSLT 1 is limited but supported by major modern browsers. XSLT 2 is not supported by most browsers but often executed on the server side or rather offline to generate aggregated static html pages from XML/HTML with e.g. Saxon CE. On the downside XSLT may be more difficult to start with than PHP.
Using JavaScript (JS) you can also let the browser load additional documents into a currently displayed document. This is also known as AJAX and can be done with e.g. jQuery or AngularJS. With JS you can create interactive web pages and most modern websites make use of it.
BUT: Loading contents with JS on the client side limits the ability of search engines to index your content (bots usually do not execute JS). You should only use this method if your contents should not be crawled by bots or if you provide an alternative.
Of course, there is also a plethora of other template/programming languages that offer server side solutions for your problem like Java, Python and Ruby and their specialized frameworks.
Additionally you should check out one of the many existing PHP CMS (server side HTML page generator with UI to edit content).
I have several HTML pages and some of the content is same for all the pages. Is there a way to put the content into a single file and include it in all the HTML Pages?
Lets say that the common data is in HTML format.
Yes you can use iframes for this purpose.
Design your master page in .html format and use it with iframe tag
<iframe src="MasterPage.html"></iframe>
Refer following link:
http://reference.sitepoint.com/html/iframe
I think what you are looking for is a templating solution.
You can do it in jsp as follows
by using two ways
<jsp:include page="reuse.html" />
or
<#include file="reuse.html">
Have a look at this question What is the difference between <jsp:include page = ... > and <%# include file = ... >?
You can do this in three places:
At build/publication time — you generate HTML documents from your data sources and then publish static files. This option works for everybody, but can make the build times rather long for very large sites. I use ttree for this.
At run time, on the server — this works in much the same way as the previous option, but is done on the server and on demand (i.e. when a page is requested). Template-toolkit is also an option here, but here are many many others, including Django templates and Smarty.
At run time, on the client — this involves pulling the content together using frames or JavaScript. It is unfriendly to search engines and will break bookmarking unless you are very careful. I don't recomment it.
One thing you can try is using PHP.
for example if all pages have a common header, create a new document with the name of header.php and place the contents of the header div inside. Every other page you want the header to appear just call it by using :
<?php include_once("header.php");?>
Hope this helps
The best way to do this is at run time.
This means using PHP, ASP, JSP or another server-side scripting solution to join your pages together on demand when sending them to the client.
In PHP, this can be achieved with the following:
<?php
include_once("head.php");
?>
<!-- some body content -->
<?php
include_once("foot.php");
?>
Managing your header, footer and content all separately makes it very easy to update your design without having to edit many files.
It is not recommended to do this client-side with frames/iframes, as this is very unfriendly to search engines and can slow down your server as several HTTP requests must be initiated.
This would be an HTML minifier that skips everything between <% and %>.
Actually, an Open Source HTML minifier would be a good starting place, especially if it already had code to preserve the contents certain blocks like <textarea. It's code might be able to be made to preserve <%%> blocks also.
I am aware that HTML minifiers are less common because that changes more often than JS/CSS and is often dynamically generated, but if the JSP compiler could be made to minify before making its compiled cache copy, it would result in minified HTML.
Also, an ASP minifier would probably be very close to the same thing. And I don't care about custom tags that have meaning to the server. The only stuff that matters to the server (for my company) is in the <%%> blocks.
This question is a bit outdated but an answer with a resource still hasn't made it's way to the posting.
HtmlCompressor makes this very thing possible and quite simply.
You can use it via Java API:
String html = getHtml(); //your external method to get html from memory, file, url etc.
HtmlCompressor compressor = new HtmlCompressor();
String compressedHtml = compressor.compress(html);
Or you can use it via Taglib:
Download .jar file of the current release and put it into your lib/ directory
Add the following taglib directive to your JSP pages:
<%# taglib uri="http://htmlcompressor.googlecode.com/taglib/compressor" prefix="compress" %>
Please note that JSP 2.0 or above is required.
In JSP:
<compress:html removeIntertagSpaces="true">
<!DOCTYPE html>
...
</html>
</compress:html>
Cheers
JSP is transformed to Java code and subsequntly compiled to bytecode. Minifying JSP has no purpose then.
You can process output generated by JSP page by writing custom filter. I have written filter to trim empty lines and unnecessary whitespace from JSP output, unfortunately it's not public. But if you google around, I'm sure you can find servlet filters to remove unneeded stuff from generated HTML.
Have a look at the Trim Filter (http://www.servletsuite.com/servlets/trimflt.htm), which you can simply map in your web.xml.
It will help you to remove whitespace, and can also strip off comments.
From my experience, whitespace occurs a lot in JSPs if you use tags that themselves don't have any output, such a the JSTL C control tags (c:if, c:choose, ...), and then this comes in very handy.
As you are already aware that HTML minification is less common and it also results in errors sometime than getting any benefit out of it. HTML is also dynamically generated content.
On the other hand, there are many better ways to speed up the application front end.
Minimizing HTTP requests
Minifying JS, CSS contents
gzip/deflate contents
Leveraging browser cache
Server Side caching, until resource changes
And many other - http://developer.yahoo.com/performance/rules.html
WebUtilities is a small java library to help speed up J2EE webapp front-end. Below is the link.
http://code.google.com/p/webutilities/
With new 0.0.4 version it does many optimization and results in significant performance boost. Please have a look in case you find it useful.