Want to build a very simple app that both has some html pages but will allow for an api as the output is just some calculations done by js.
I want to render a json output from my controller and not render html file. Any ideas how to do so with angularjs?
The problem is that a JSON document will be a single request, where the returned content has content type application/json.
If you want Angular.js, which is a frontend library, you need to make a request for an HTML document (and render the necessary HTML markup in the process), then for the angular.js library. What is rendered afterwards is still HTML (content type: text/html).
So the answer is: no, you cannot do that with Angular.js.
You will need a server-side script to output a properly formatted JSON (and nothing else) and the correct Content-Type header.
Here is a AngularJS module called json. Use it as a filter in your output.
Usage (In HTML Template Binding):
{{ json_expression | json }}
Usage (In JavaScript):
$filter('json')(object)
Where the object is
Any JavaScript object (including arrays and primitive types) to filter.
Example:
<pre>{{ {'name':'value'} | json }}</pre>
Output:
{
"name": "value"
}
Related
I hvae an angular view of a pdf preview that utilizes a controller to fill the view in. I am using pdflayer then to convert the html page into a pdf. The problem however is that no matter how I try and do this the scope variable values never make it into the pdf. I am basically trying to figure out a way to capture the angular view as an html string (data already injected) so that I can pass it to pdflayer. I have tried creating a directive and used replace within the directive then collecting the DOM as a string using .HTML().
For example:
I could like this
<div id="name">{{test.name}}</div>
to become this
<div id="name">Bob Smith</div>
It inevitably however turns into this when i use $('#name').html() and then console log it
<div id="name"></div>
or
<div id="name">{{test.name}}</div>
Any help would be appreciated even if the solution is to use a different method to create the pdf. Ultimately, I need to get a angular view into a formated pdf.
Please check if below library would work for you : https://www.npmjs.com/package/angular-save-html-to-pdf
I have a frontend JSP that does this:
<label>{{metadata[key].displayName}}:</label>
this works and displays the value
However, that value is really a "key" to an ApplicationResource defined in the Struts 1 framework. So, ultimately, I want to do something like this
<label><bean:message key="{{metadata[key].displayName}}"/>:</label>,
but this does not work, and the error I get (in logs) is
Missing message for key '{{metadata[key].displayName}}'.
This means, that all configurations were OK, and the only issue is getting that
{{metadata[key].displayName}} properly into the "key" attribute of a struts-bean tag.
How can it be done? The more complete code I have is here:
<div class="row" ng-repeat="(key, val) in item"
ng-if="metadata.hasOwnProperty(key)">
<div>
<%-- <label>{{metadata[key].displayName}}:</label> --%>
<label><bean:message key="<%={{key}}%>"/>:</label>
</div>
</div>
Angular works with the DOM, that already has been loaded by the browser. JSP is executed on the server side before the HTML is sent to the browser. If you can translate a message key at this stage then it will be rendered in resulting HTML where you can use its value to populate Angular model. And then bind its property to the view, which already should have translated value.
On the other hand if you can't map a key to the value on the server side, you still have a choice to get translated value for the key sent as parameter to another action. It's not recommended way to make much xhr requests to the server just for returning the translated value. However if your action will return JSON object, then it could be adopted with angular model.
I get JSON like this
{
"lots of":"keys"
"description" : {
"key":"Some sample key",
"value":"This is the markup™"
}
}
from server and I ultimately iterate the description objects and populate table rows with two columns: one for the key and one for the value.
I have tried putting on my <td> tag ng-bind-html as well as injecting $sce into my controller and using trustAsHtml but so far the string always displays as it is in the JSON. Not every value will be HTML but I can easily detect based on the key if HTML is a possibility. It seemed when I put in the directive on the td it did not display anything if no HTML was present. I am interested in using something that can allow HTML in the value but not require it so I can display either
HTML fragment
<tr ng-repeat="(key, val) in record.description">
<td>{{key}}:</td>
<td>{{val}}</td>
</tr>
I created a quick fiddle here:
https://jsfiddle.net/frishi/mvw97s3q/6/
I used angular-sanitize, which I am not sure you mentioned injecting in your module dependency list. Either way, the example works simply by using ng-bind-html
Relevant docs page: https://docs.angularjs.org/api/ng/directive/ngBindHtml
It works by using the directive ng-bind-html on the element you want to display the HTML string in. You use it like so:
<p ng-bind-html="data.firstName"></p>
assuming that data.firstName = "<strong>FeeFee</strong>" or something like that.
I would also like to add that Angular does not allow this natively because of legitimate security concerns. That and the fact that allowing arbitrary HTML to be rendered might not always produce desirable results. Your page layout could quite possibly break because of some HTML you allowed to be passed through.
Angular was designed with security in mind, and will prevent you from displaying HTML from raw strings whenever possible - to prevent various injection attacks.
Here is workarround for your problem: AngularJS: Insert HTML from a string. Generally you should use ng-bind-html insted of ng-bind (this is used by curly braces).
I'm trying to use react.js in Hugo. I know Go template variables are accessible in HTML file.
My question is how to access them in javascript. or is there a workaround?
thanks in advance.
UPDATE：
currently my workaround is to use meta tags in HTML and load Go template variables like this:
<meta name="title" content={{.Title}} />
and then in javascript,
function getMetaTitle() {
var metas = document.getElementsByTagName('meta');
for (i=0; i<metas.length; i++) {
if (metas[i].getAttribute("name") == "title") {
return metas[i].getAttribute("content");
}
}
return "failed to access...";
}
var metaTitle = getMetaTitle();
but this way is inconvenient when the number of meta tags growing, is there a more concise way to do this?
I doubt Hugo and React is a good pair but that's off topic and I might be wrong about that. You are asking, how to get Hugo variables into website's JavaScript. My answer:
Hugo is static website engine, so it only converts templates and markup documents (with your content) into HTML files. Now, when you upload your files onto your server, your JS cannot see anything Hugo — only your files.
The question becomes, how to transfer Hugo variables into some files of your website.
As you suggested, it's best to write variables into your HTML (or JSON) using Hugo, then read them by JS. If it's small amount, use attributes or tags. If there's a lot and it doesn't differ per-page, use a separate JSON file.
For example, personally I have a multilingual site which a) requires different language titles to appear dynamically via JS; b) uses JS which queries different Lunr.js search indexes in JSON format.
For both I use data-<name> attributes:
<section class="section-search" data-index="{{ .Site.BaseURL }}searchIndex.json" id="section-search">
<input type="search" id="search-input" placeholder="{{ ( index $.Site.Data.translations $.Site.Params.locale ).dataloading }}" data-loaded="{{ ( index $.Site.Data.translations $.Site.Params.locale ).dataloaded }}">
<!-- search button goes here -->
</section>
For example, on English templates (rendered into /public/), data-loaded attribute would be in English, but for Lithuanian templates (rendered into /public/lt/), data-loaded attribute would be in Lithuanian.
I wouldn't worry about "growing meta tags", but you could maybe write variables into a JSON file and then read it in JS if you are concerned about HTML bloat?
I'm building custom JSON first as HTML, then minifying/renaming it into JSON when building indexes for Hugo Lunr search as per this recipe. Instead of "baking in" the content with range as in mentioned recipe, you could simply list all the variables.
By the way, I'm using npm scripts as a build runner (instead of Grunt/Gulp) so I use json-minify:
"index:prepare": "json-minify public/json/index.html > public/site-index.json",
You could "bake" JSON files with any content (including Hugo template variables) via Hugo this way. Hope it helps.
You can specify a custom output format for Javascript within your config.toml so that Hugo then treats those particular formats and file extensions like it's content files where it replaces the template variables with adequate values.
So, an entry such as below in your config.toml will treat javascript files as one of the media type it needs to consider for its custom output formats:
[mediaTypes]
[mediaTypes."application/javascript"]
suffix = "js"
You can read more about it here
You can, of course, inline your JS in your layout files, but that is probably not what you want.
There have been some discussions about improvements in this area on the Hugo discussion site, but nothing concrete yet.
I've managed to build a page that will display data from the database dynamically. However, this code which is saved in the database:
<p>This is the content for the radio page.</p>
Displays like this:
<p>This is the content for the radio page.</p>
The HTML tags aren't rendered. I understand that Symfony (for security purposes) renders any HTML code like this for security reasons. I want Symfony (obviously) to render these HTML tags. How can I achieve this just for this purpose only, so that Symfony still sanitises any HTML tag that is saved to the database elsewhere on the site?
For your information as well, this is the code that I am using to pull the data from the database:
public function mainpageAction($slug)
{
$content = $this->getDoctrine()
->getRepository('SiteMainBundle:Content')
->find($slug);
if (!$content) {
throw $this->createNotFoundException('No product found for slug '.$slug);
}
return $this->render('SiteMainBundle:Default:page.html.twig', array('content' => $content, 'slug' => $slug));
}
Also, just so I can learn more about Symfony, is the rendering of the HTML tags just the sole job of PHP or could it be rendered properly using Twig?
Many thanks!
If you want to do that, you need to use the raw filter in the twig template. Like described in the twig documentation, the raw filter marks the value as safe which means that in an environment with automatic escaping enabled this variable will not be escaped if raw is the last filter applied to it.
In your case, it's : {{ content | raw }}