Angular 2 - innerHTML styling

Question

I am getting chunks of HTML codes from HTTP calls  I put the HTML blocks in a variable and insert it on my page with innerHTML  but i can not style the inserted HTML block  Does anyone have any suggestion how i might achieve this     Component  selector   calendar   template    lt div  innerHTML   calendar  gt  lt  div gt    providers  HomeService    styles      h3  color red         The HTML that I want to style is the block contained in the variable  calendar

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The recommended version by G  nter Z  chbauer works fine  but I have an addition to make  In my case I had an unstyled html-element and I did not know how to style it  Therefore I designed a pipe to add styling to it  import   Pipe  PipeTransform   from   angular core   import   DomSanitizer  SafeHtml   from   angular platform-browser      Pipe       name   StyleClass     export class StyleClassPipe implements PipeTransform        constructor private sanitizer  DomSanitizer          transform html  any  styleSelector  any  styleValue  any   SafeHtml           const style     style    quot   styleSelector     styleValue   quot            const indexPosition   html indexOf   gt             const newHtml    html slice 0  indexPosition   style  html slice indexPosition   join              return this sanitizer bypassSecurityTrustHtml newHtml             Then you can add style to any html-element like this   lt span  innerhtml   quot Variable   StyleClass   margin    0  quot  gt   lt  span gt   With  Variable     lt p gt  Test  lt  p gt

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update 2   slotted    slotted is now supported by all new browsers and can be used with ViewEncapsulation ShadowDom  https   developer mozilla org en-US docs Web CSS   slotted  update 1   ng-deep   deep  was deprecated and replaced by   ng-deep     ng-deep is also already marked deprecated  but there is no replacement available yet    When ViewEncapsulation Native is properly supported by all browsers and supports styling accross shadow DOM boundaries    ng-deep will probably be discontinued    original  Angular adds all kinds of CSS classes to the HTML it adds to the DOM to emulate shadow DOM CSS encapsulation to prevent styles of bleeding in and out of components  Angular also rewrites the CSS you add to match these added classes  For HTML added using  innerHTML  these classes are not added and the rewritten CSS doesn t match   As a workaround try    for CSS added to the component         host  deep  mySelector       host   ng-deep mySelector      background-color  blue       for CSS added to index html        body  deep  mySelector      body   ng-deep mySelector     background-color  green       gt  gt  gt   and the equivalent deep  but  deep  works better with SASS  and   shadow were added in 2 0 0-beta 10  They are similar to the shadow DOM CSS combinators  which are deprecated  and only work with encapsulation  ViewEncapsulation Emulated which is the default in Angular2  They probably also work with ViewEncapsulation None but are then only ignored because they are not necessary  These combinators are only an intermediate solution until more advanced features for cross-component styling is supported   Another approach is to use   Component           encapsulation  ViewEncapsulation None       for all components that block your CSS  depends on where you add the CSS and where the HTML is that you want to style - might be all components in your application   Update  Example Plunker

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Use the below method to allow css styles in innerhtml  import   DomSanitizer  SafeHtml   from   angular platform-browser           html  SafeHtml   constructor protected  sanitizer  DomSanitizer    this html   this  sanitizer bypassSecurityTrustHtml    lt html gt     lt head gt  lt  head gt     lt body gt       lt div style  quot display flex  color  blue  quot  gt         lt div gt           lt h1 gt Hello World        lt  h1 gt         lt  div gt       lt  div gt     lt  body gt   lt  html gt        Example code stackblitz Or use the below method to write directly in html  https   gist github com klihelp 4dcac910124409fa7bd20f230818c8d1

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If you are using sass as style preprocessor  you can switch back to native Sass compiler for dev dependency by   npm install node-sass --save-dev  So that you can keep using  deep  for development

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We pull in content frequently from our CMS as  innerHTML   content title   We place the necessary classes in the application s root styles scss file rather than in the component s scss file  Our CMS purposely strips out in-line styles so we must have prepared classes that the author can use in their content  Remember using   content title   in the template will not render html from the content

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The simple solution you need to follow is  import   DomSanitizer   from   angular platform-browser    constructor private sanitizer  DomSanitizer     transformYourHtml htmlTextWithStyle        return this sanitizer bypassSecurityTrustHtml htmlTextWithStyle

User · Answer

If you re trying to style dynamically added HTML elements inside an Angular component  this might be helpful     inside component class         constructor private hostRef  ElementRef           getContentAttr    string     const attrs   this hostRef nativeElement attributes   for  let i   0  l   attrs length  i  lt  l  i          if  attrs i  name startsWith   nghost-c            return   ngcontent-c  attrs i  name substring 9                     ngAfterViewInit          dynamically add HTML element   dynamicallyAddedHtmlElement setAttribute this getContentAttr           My guess is that the convention for this attribute is not guaranteed to be stable between versions of Angular  so that one might run into problems with this solution when upgrading to a new version of Angular  although  updating this solution would likely be trivial in that case

[angular] Angular 2 - innerHTML styling

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