I want to use an html page with common code for all the other html pages. I know how to do with with css but I tried and failed with html. The code I am using and changing constantly is present on all the other pages so it's annoying to continually go through each page to change it. How can I do this?
you can use this plain html + js alternative : https://www.w3schools.com/howto/howto_html_include.asp
with example : https://www.w3schools.com/howto/tryit.asp?filename=tryhow_html_include_2
See the example :
<!DOCTYPE html>
<html>
<script>
function includeHTML() {
var z, i, elmnt, file, xhttp;
/*loop through a collection of all HTML elements:*/
z = document.getElementsByTagName("*");
for (i = 0; i < z.length; i++) {
elmnt = z[i];
/*search for elements with a certain atrribute:*/
file = elmnt.getAttribute("w3-include-html");
if (file) {
/*make an HTTP request using the attribute value as the file name:*/
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4) {
if (this.status == 200) {elmnt.innerHTML = this.responseText;}
if (this.status == 404) {elmnt.innerHTML = "Page not found.";}
/*remove the attribute, and call this function once more:*/
elmnt.removeAttribute("w3-include-html");
includeHTML();
}
}
xhttp.open("GET", file, true);
xhttp.send();
/*exit the function:*/
return;
}
}
};
</script>
<body>
<div w3-include-html="h1.html"></div>
<div w3-include-html="content.html"></div>
<script>
includeHTML();
</script>
</body>
</html>
you can use iframe to split the content of the page. for example if the header is always the same you can place it in a iframe so if you modify it, chenges will affect all the pages. but I think this method is obsolete.
you could convert your html pages into a php instead and split the static code in another php file so in all pages you could include the static content.
I am assuming you are just getting started. So here are high level the three options you have in order of what is most easy to implement (not necessarily what is technically the best):
Use iframes. These allow you to load one HTML page into another, so you can have an outer page that has the common content and the changing content goes into the iframe.
Use JavaScript, you could have a basic page and then load the other content using JavaScript. A very simple way is to use the jQuery library which has a load() function that could do what you need.
Generate the HTML dynamically on the server. There are a lot of different ways. The easiest would be PHP.
Related
On the html for my page I have a <script id="pagedata"></script> element which I would like to add an element to only if a certain partial is rendered. In my layout.cshtml I have the following:
#if (Brand != null)
{
#Html.Partial("_UseApp");
}
And in my _UseApp.cshtml:
#{
var iosAppUrl = // retrieve iosLink from our CRM database
var androidUrl = // retrieve android link from our CRM database
// Here I want to add the above variables to the <script id=pagedata> in the html page. Something
like this:
PageData.AddPageData("appstore", iosAppUrl);
PageData.AddPageData("playstore", androidUrl);
I cannot work out how to do this - I set breakpoints in the UseApp.cshtml file and the file is being called, but I don't know how to add these script elements. I don't want to just add them into the layout file because I want to keep the app logic separate. Can anyone help? Thanks
My approach to this would be to use jQuery, as reading HTML elements in C# is rather difficult.
In the script below, it checks if the HTML exists, and if it does, we will assign an attribute to it. The second argument in attr() will be your link, note that you can use C# to get the value from your Db, by using the model or ViewBag.
#section Scripts{
<script>
$(document).ready(function () { // on ready
if ($("#replaceWithYourId").length) { // check if ID exists
$("#pagedata").attr("data-playstore", "link") // use jQuery attr method.
}
});
</script>
}
I'm writing a book using HTML. If I write it in one html file, the whole code becomes long, so I want to save each chapters to different files and load them in main html. I mean there are files like chapter1.html, chapter2.html, ... and I want to include the contents of them in the other file main.html.
Is this possible?
If you wish to do this dynamically. you can use javascript instead of <iframe>. Save the HTML content you want to include inside content.html
<script>
function includeHTML() {
var z, i, elmnt, file, xhttp;
/*loop through a collection of all HTML elements:*/
z = document.getElementsByTagName("*");
for (i = 0; i < z.length; i++) {
elmnt = z[i];
/*search for elements with a certain atrribute:*/
file = elmnt.getAttribute("data-include-html");
if (file) {
/*make an HTTP request using the attribute value as the file name:*/
xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4) {
if (this.status == 200) {elmnt.innerHTML = this.responseText;}
if (this.status == 404) {elmnt.innerHTML = "Page not found.";}
/*remove the attribute, and call this function once more:*/
elmnt.removeAttribute("data-include-html");
includeHTML();
}
}
xhttp.open("GET", file, true);
xhttp.send();
/*exit the function:*/
return;
}
}
}
</script>
You can Add it to the HTML page Later like below.
<div data-include-html="content.html"></div>
You could use iframe to embed each page into main.html
For example:
<iframe src="chapter1.html"></iframe>
<iframe src="chapter2.html"></iframe>
You could also create it into a slideshow, so that it looks more like a book.
That depends on what you want to achieve. In general it's not bad to split the content by Chapters and just link to them. That way the reader isn't overwhelmed and if the book is large it reduces loading time.
Where and how do you want to publish that book? HTML provides multiple means to do what you want (Frames and iFrames, both not that "cool" nowadays), however if you're using some Server Side Scripting (like a CMS), you could use other means there.
Or you could have seperated html files and then use some simple concatenation (like with batch/linux shell) to generate a the big output html then.
I'm working on a "browser extension" using "Kango Framework" (http://kangoextensions.com/)
When i want to link a css file i have to use external source (href='http://mysite.com/folder/mysite.css), how should i change the href to make is source from the plugin folder ? (ex: href='mylocalpluginfolder/localfile.css')
i've tried 'localfile.css' and putting the file in the same folder as the JS file.
$("head").append("");
How should i change the json file to make it work ? Should i declare the files as "extended_scripts" or "content_scripts" ?
I've a hard time finding support for this framework, even though the admins are awesome !
Thanks for your help. (please do not suggest to use other solutions, because i won't be able to code plugins for IE and Kango is my only option for this). I didn't find any samples matching my need as the only example available on their site is linking to outside content (christmas tree).
If you want to add CSS in page from content script you should:
Get CSS file contents
Inject CSS code in page
function addStyle(cssCode, id) {
if (id && document.getElementById(id))
return;
var styleElement = document.createElement("style");
styleElement.type = "text/css";
if (id)
styleElement.id = id;
if (styleElement.styleSheet){
styleElement.styleSheet.cssText = cssCode;
}else{
styleElement.appendChild(document.createTextNode(cssCode));
}
var father = null;
var heads = document.getElementsByTagName("head");
if (heads.length>0){
father = heads[0];
}else{
if (typeof document.documentElement!='undefined'){
father = document.documentElement
}else{
var bodies = document.getElementsByTagName("body");
if (bodies.length>0){
father = bodies[0];
}
}
}
if (father!=null)
father.appendChild(styleElement);
}
var details = {
url: 'styles.css',
method: 'GET',
async: true,
contentType: 'text'
};
kango.xhr.send(details, function(data) {
var content = data.response;
kango.console.log(content);
addStyle(content);
});
I do it another way.
I have a JSON containing the styling for specified web sites, when i should change the css.
Using jQuery's CSS gives an advantage on applying CSS, as you may know css() applying in-line css and inline css have a priority over classes and IDs defined in default web pages files and in case of inline CSS it will override them. I find it fine for my needs, you should try.
Using jQuery:
// i keep info in window so making it globally accessible
function SetCSS(){
$.each(window.skinInfo.css, function(tagName, cssProps){
$(tagName).css(cssProps);
});
return;
}
// json format
{
"css":{
"body":{"backgroundColor":"#f0f0f0"},
"#main_feed .post":{"borderBottom":"1px solid #000000"}
}
}
As per kango framework structure, resources must be placed in common/res directory.
Create 'res' folder under src/common folder
Add your css file into it and then access that file using
kango.io.getResourceUrl("res/style.css");
You must add this file into head element of the DOM.
This is done by following way.
// Common function to load local css into head element.
function addToHead (element) {
'use strict';
var head = document.getElementsByTagName('head')[0];
if (head === undefined) {
head = document.createElement('head');
document.getElementsByTagName('html')[0].appendChild(head);
}
head.appendChild(element);
}
// Common function to create css link element dynamically.
function addCss(url) {
var css_tag = document.createElement('link');
css_tag.setAttribute('type', 'text/css');
css_tag.setAttribute('rel', 'stylesheet');
css_tag.setAttribute('href', url);
addToHead(css_tag);
}
And then you can call common function to add your local css file with kango api
// Add css.
addCss(kango.io.getResourceUrl('res/style.css'));
I was trying to develop a Chrome extension that can display me the last 3 news from a soccer news site (obviously the page is not open in any tab), by refreshing every 5 minutes. My ideea was to load the page inside an iframe and, once the page is loaded, access the page DOM and extract only the text nodes with the news. I've tried in many ways using ready and load functions, I tried to follow this solutions here but i always get warnings. My question is: is there a way I can do that without having troubles with cross-domain security? Are there any simple examples i can use?
Here's how you could do it using JQuery (please keep in mind I dont know JQuery, just saw this approach somewhere and thought it might work for you).
I put this in a popup and it worked....
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
<script>
function renderNews(newsList){
$('#news').html('');
$(newsList).each(function(i,item){
var link = document.createElement('a');
$(link).attr('href',item.link);
$(link).html(item.description);
$(link).click(function(){
chrome.tabs.create({url:$(this).attr('href')});
});
var linksDate = document.createElement('span');
//$(linksDate).text(item.date);
$(linksDate).text(item.day + '-' + item.month + ' ' + item.hour + ':' + item.minute+' - ');
var listItem = document.createElement('li');
$(listItem).append(linksDate).append(link);
$("#news").append(listItem);
});
}
function getNews() {
$.get("http://www.milannews.it/?action=search§ion=32", null, function(data, textStatus)
{
if(data) {
var news=$(data).find(".list").find('li').slice(0,3) ;
$("#status").text('');
var newsList=[];
$(news).each(function(i, item){
var newsItem={};
newsItem.description=$(item).find('a').html();
newsItem.link='http://www.milannews.it/'+$(item).find('a').attr('href');
newsItem.date=$(item).find('span').first().text();
newsItem.day=newsItem.date.split(' ')[0].split('.')[0];
newsItem.month=newsItem.date.split(' ')[0].split('.')[1];
newsItem.hour=newsItem.date.split(' ')[1].split(':')[0];
newsItem.minute=newsItem.date.split(' ')[1].split(':')[1];
newsList[i]=newsItem;
});
renderNews(newsList);
localStorage.setItem('oldNews',JSON.stringify(newsList));
}
});
}
function onPageLoad(){
if (localStorage["oldNews"]!=null) renderNews(JSON.parse(localStorage["oldNews"]));
getNews();
}
</script>
</head>
<body onload="onPageLoad();" style="width: 700px">
<ul id="news"></ul>
<div id="status">Checking for new news...</div>
</body>
</html>
And dont forget to put the urls your getting with the xhr stuff in the permissions part of your manifest....
http://code.google.com/chrome/extensions/xhr.html
Use xhr to load the page and use jQuery or a regex to parse the raw HTML for the data you are looking for.
Keep in mind that the destination site may not want to you access their site in such an automated fashion. Be respectful of their site and resources.
I see that Lifehacker is able to change the url while using AJAX to update part of the page. I guess that can be implemented using HTML5 or history.js plugin, but I guess lifehacker is using neither.
Does any one has a clue on how they do it?
I am new to AJAX and just managed to update part of the page using Ajax.
Thank you #Robin Anderson for a detailed step by step algo. I tried it and it is working fine. However, before I can test it on production, I would like to run by you the code that I have. Did I do everything right?
<script type="text/javascript">
var httpRequest;
var globalurl;
function makeRequest(url) {
globalurl = url;
/* my custom script that retrieves original page without formatting (just data, no templates) */
finalurl = '/content.php?fname=' + url ;
if(window.XMLHttpRequest){httpRequest=new XMLHttpRequest}else if(window.ActiveXObject){try{httpRequest=new ActiveXObject("Msxml2.XMLHTTP")}catch(e){try{httpRequest=new ActiveXObject("Microsoft.XMLHTTP")}catch(e){}}}
/* if no html5 support, just load the page without ajax*/
if (!(httpRequest && window.history && window.history.pushState)) {
document.href = url;
return false;
}
httpRequest.onreadystatechange = alertContents;
alert(finalurl); /* to make sure, content is being retrieved from ajax */
httpRequest.open('GET', finalurl);
httpRequest.send();
}
/* for support to back button and forward button in browser */
window.onpopstate = function(event) {
if (event.state !== null) {
document.getElementById("ajright").innerHTML = event.state.data;
} else {
document.location.href = globalurl;
return false;
};
};
/* display content in div */
function alertContents() {
if (httpRequest.readyState === 4) {
if (httpRequest.status === 200) {
var stateObj = { data: httpRequest.responseText};
history.pushState(stateObj, "", globalurl);
document.getElementById("ajright").innerHTML = httpRequest.responseText;
} else {
alert('There was a problem with the request.');
}
}
}
</script>
PS: I do not know how to paste code in comment, so I added it here.
It is not an requirement to have the markup as HTML5 in order to use the history API in the browser even if it is an HTML5 feature.
One really quick and simple implementation of making all page transistions load with AJAX is:
Hook up all links except where rel="external" exist to the function "ChangePage"
When ChangePage is triggered, check if history API is supported in the browser.
If history API isn't supported, do either push a hashtag or make a normal full page load as fallback.
If history API is supported:
Prevent the normal link behaviour.
Push the new URL to the browser history.
Make a AJAX request to the new URL and fetch its content.
Look for your content div (or similar element) in the response, take the HTML from that and replace the HTML of the corresponding element on the current page with the new one.
This will be easy to implement, easy to manage caches and work well with Google's robots, the downside is that is isn't that "optimized" and it will be some overhead on the responses (compared to a more complex solution) when you change pages.
Will also have backward compatibility, so old browsers or "non javascript visitors" will just get normal page loads.
Interesting links on the subject
History API Compatibility in different browsers
Mozillas documentation of the History API
Edit:
Another thing worth mentioning is that you shouldn't use this together with ASP .Net Web Forms applications, will probably screw up the postback handling.
Code addition:
I have put together a small demo of this functionality which you can find here.
It simply uses HTML, Javascript (jQuery) and a tiny bit of CSS, I would probably recommend you to test it before using it. But I have checked it some in Chrome and it seems to work decent.
Some testing I would recommend is:
Test in the good browsers, Chrome and Firefox.
Test it in a legacy browser such as IE7
Test it without Javascript enabled (just install Noscript or similar to Chrome/Firefox)
Here is the javascript I used to achieve this, you can find the full source in the demo above.
/*
The arguments are:
url: The url to pull new content from
doPushState: If a new state should be pushed to the browser, true on links and false on normal state changes such as forward and back.
*/
function changePage(url, doPushState, defaultEvent)
{
if (!history.pushState) { //Compatability check
return true; //pushState isn't supported, fallback to normal page load
}
if (defaultEvent != null) {
defaultEvent.preventDefault(); //Someone passed in a default event, stop it from executing
}
if (doPushState) { //If we are supposed to push the state or not
var stateObj = { type: "custom" };
history.pushState(stateObj, "Title", url); //Push the new state to the browser
}
//Make a GET request to the url which was passed in
$.get(url, function(response) {
var newContent = $(response).find(".content"); //Find the content section of the response
var contentWrapper = $("#content-wrapper"); //Find the content-wrapper where we are supposed to change the content.
var oldContent = contentWrapper.find(".content"); //Find the old content which we should replace.
oldContent.fadeOut(300, function() { //Make a pretty fade out of the old content
oldContent.remove(); //Remove it once it is done
contentWrapper.append(newContent.hide()); //Add our new content, hidden
newContent.fadeIn(300); //Fade it in!
});
});
}
//We hook up our events in here
$(function() {
$(".generated").html(new Date().getTime()); //This is just to present that it's actually working.
//Bind all links to use our changePage function except rel="external"
$("a[rel!='external']").live("click", function (e) {
changePage($(this).attr("href"), true, e);
});
//Bind "popstate", it is the browsers back and forward
window.onpopstate = function (e) {
if (e.state != null) {
changePage(document.location, false, null);
}
}
});
The DOCTYPE has no effect on which features the page can use.
They probably use the HTML5 History API directly.