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How to save and load a page with two angular2 components from local storage?

I have been trying to save and load a page with two angular2 components from local storage with the next code but the css from components is never applied.
This is my code to save:
localStorage.setItem('body', JSON.stringify(document.getElementById("body").innerHTML));
This is my code to load:
document.getElementById("body").innerHTML=JSON.parse(localStorage.getItem("body"));
I hope to have explained my problem well

Sorry, you cannot do that. Angular likes to take over a lot of the DOM, so you cannot just replace the entire body of the DOM. However, if instead of doing the entire "body", you did a subset, then you could do this:
<div [innerHTML]="htmlVar">
</div>
Where htmlVar is a variable you loaded with something like:
this.htmlVar = JSON.parse(localStorage.getItem("htmlVar"))
Watch out, by default innerHTML will strip out lots of "unsafe" html. You can reenable most of them by calling DomSanitizer. Please note that you cannot use any Angular features in the html, like links with routerLink.

Having same <div> on all my sites

I want to create a site like any other. I want the "thing" at the top (home downloads and stuff) to be on all my pages. Do I need to copy and paste the same code over and over again?

put the common part in your header/some specific file and use ,since you will be using header/some specific file on all pages so the desired content will also be loaded.

Learn Psd to html conversion For batter understanding the divs and styles modification and customization.. your divs and tags can be easily maintained with your stylesheet by giving id and classes you can also give one dive multiple classes and ids,
you are talking about master page i think
that is one in style and in that page you're showing other page, likely we can say one template page and many functionality see this and
see this

As far as I'm concerned pretty much all the intelligent options for solving this problem are mentioned in this question
Use a server-side template (e.g.php), use a client-side template (e.g. handlebars), use javascript, or you could use a static site generator like Jekyll.

Building a Windows 8 Metro app with jQuery

I am just starting out with Windows 8 development using HTML/JS. I've spent the last few months immersed in jQuery development for apps targeting vehicle head-units and televisions.
Jumping into this, I thought the transition would be simple. I have the design and structure of my site all figured out for the most part and was hoping to follow some of the practices I had been using for my previous work.
That is, I want to essentially create a single page app. The main default.html file will house the top navigation/title and one other div. The other div will be used to load in all the other pages, all separate HTML files within the project.
All of the global functions and major functionality will reside in a javascript file, application.js. Then any page-specific javascript will reside at the top of each HTML file.
I'm quickly realizing that this is a problem. Using jQuery.load() to load in my pages causes security errors in my app.
JavaScript runtime error: Unable to add dynamic content. A script attempted to inject dynamic content, or elements previously modified dynamically, that might be unsafe. For example, using the innerHTML property to add script or malformed HTML will generate this exception. Use the toStaticHTML method to filter dynamic content, or explicitly create elements and attributes with a method such as createElement.
I was really hoping to avoid having to learn a bunch of Microsoft-specific stuff. I think it's great that they've provided a lot of tools and what not, and maybe I just haven't used them enough, but everything just feels too rigid for me and for what I'm trying to do or can already be accomplished with jQuery. I'm one who likes to know EXACTLY what is happening and have full control over it.
Also looking through the templates and sample projects, I really don't like all the repeated code. For instance, every single HTML file declaring all the same references. I want to write my references and sections like my title bar just once, and not have to copy/paste that code all over my project.
Is there a way to do things the way I was hoping, and create a single page app? Do they have their own substitute for jQuery's .load()?
Any help pointing me in the right direction would be much appreciated!
EDIT 8/14/2012:
I have tried using the fix from this question:
Using jQuery with Windows 8 Metro JavaScript App causes security error
This gets rid of the security warning and I can load in HTML using jQuery.load(). However, looking at DOM explorer, my HTML is being stripped of my scripts.
I have also tried wrapping my .load() call inside of MSApp.execUnsafeLocalFunction(), but yet again my file still gets stripped of all scripts. What gives?

I fixed by simply changing the line of jQuery that was causing the error.
jQuery-1.8.0, line 5566:
append: function () {
return this.domManip(arguments, true, function (elem) {
if (this.nodeType === 1 || this.nodeType === 11) {
self.appendChild(elem); // problem line
}
});
},
Changed to:
append: function () {
return this.domManip(arguments, true, function (elem) {
if (this.nodeType === 1 || this.nodeType === 11) {
var self = this;
MSApp.execUnsafeLocalFunction(function () {
self.appendChild(elem);
});
}
});
},

There is a "formal" way to do what you are seeking.
WinJS.Navigation is provided to support "single page apps". For example, the default.html would contain a markup that would represent where the dynamically loaded page content would go:
<div id="contenthost"
data-win-control="Application.PageControlNavigator"
data-win-options="{home: '/pages/home/home.html'}">
</div>
In the example above, the actual content page loaded is at /pages/home/home.html
In event handlers, you can simply do the following to load or navigate to another page:
WinJS.Navigation.nav("/pages/other/page.html");
True, it is not jQuery, but it works great :)

Depending on your app, if you are not intending to access any WinRT components, you can navigate your page to ms-appx-web which will change the security policy around the page, but you can't specify this from start up. You would have to do a navigate, and leverage that new securyt context.
The other option you have it to wrap the calls to JQuery with msWWA.execUnsafeLocalFunction function, which will enable all that unsafe code be pushed into the DOM

JavaScript Best Practices: where should I include my JavaScript?

I am building a website using PHP and JavaScript, and I feel that I have a good grasp on where to include my JavaScript, but a more specific situation has come up that has me confused. I currently have all of my JavaScript in one external file, which is being included on every PHP page.
Let's say that I have a paragraph with an id='myParagraph' and I need to highlight this paragraph in red with JavaScript on page load. This paragraph is only on ONE PHP page and my website has about 50 different pages. I immediately assumed that I should throw some code into my one external JavaScript file, something like:
$('#myParagraph').css('color', 'red')
and the paragraph would be highlighted when that page loads.
My question is: is this the best way to do it? To my understanding, every time I load a page it will be searched for an element with the id myParagraph, yet 98% of my pages won't even have that id. Is this wasteful? Should I instead include the following code:
function highlightParagraph()
{
$('#myParagraph').css('color', 'red')
}
in my one JavaScript file and then put some inline JavaScript in the PHP file with the id myParagraph to call the function highlightParagraph() when it's loaded? That way, only the one page with myParagraph will be searched and highlighted.
I feel like option 2 is the best, but I read all the time not to use inline JavaScript.
edit: I realize that for this example you would just use CSS. I'm just using it to get my question across

You should have a one "big" js file with the infrastructure functions and all the pages should have a reference to it.
Then each page should reference another js file with the functions related only.
The good things about using external js files are:
The files are cached after the first download => Faster surfing.
Separate of concerns, you keep the presentation tier away from the scripting tier.
Another important note:
The best way to change css is with css... not javascript.
I
If you change the element style on DOM ready, just add the element definition
#myParagraph{color: red;}

The problem with inline JavaScript is you might be starting with a few lines now, but in a few weeks or months, it will add up and be a lot of inline JavaScript.
That is bad, because inline JavaScript can't be cached by the browser like JavaScript files that you include with <script src="path/to/file.js" />.
That's bad because you add a lot of content that will be fetched every single page view by the user, adding load on your server bandwidth and slowing page load for the user.
If it's just a few selectors, don't worry; The time wasted on it won't cause any browser to sweat.
Though, if it becomes a lot of code for a different page/module of your site, you might want to split it into a different JavaScript file and include just that file when certain pages are loaded.
That way, the browser will cache that file and save that bandwidth for you and the user.

I wouldn't be too surprised if many people disagree with me (violently even) but I don't have a problem with putting a javascript tag with specific javascript for that page in the header if it will reduce the number of files or overall complexity of the project. Most of the core things that are done everywhere should of course be separated in another file but if it is a one page deal, then I would go for cleanliness.
The same goes for css, if it is specific to that page just put a css tag in the header with the specific changes that differ from the master css file. BTW as everyone is pointing out, this is a case where you want to just use CSS.

page content in javascript needs to go in to html

I have links that when the user clicks them, the page immediately updates by utilizing the DOM, this is what my o2() does.
Problem is I want to seperate content from logic... i.e., i would prefer the content below to be in a .html file. Currently it is in a .js file.
My understanding is that it is good practice to keep structure/content seperate from logic... For example, using advanced registration for Javascript functions as opposed to inline registration.
How do I get the html content below into a .html file?
function l1() {
o2('Ac1_3','<br/><p class="h">ALL YOUR BOOKMARKS IN ONE PLACE</p><img class="i1" src="i3.jpg" alt=""/><img class="i1" src="i4.jpg" alt=""/>');
}

If you're dynamically adding stuff to the DOM using JavaScript, there is no way around keeping that content in the JS file, unless you want to get pointlessly complex.
Personally, I think it's fine to mix content and logic a little, like this, just don't go over the top to the point where it gets confusing.