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Dec 22, 2017 - Exporting generic HTML/CSS to PDF has been an open question. The head section holds the page title and the stylesheet for the page.
![Html2pdf css stylesheet classes Html2pdf css stylesheet classes](https://codepen.io/StephanRaab/pen/PZLEYY/image/small.png)
This is an example of an informative example. Informative notes begin with the word “Note” and are set apart from the normative text with class='note', like this: Note, this is an informative note. Advisements are normative sections styled to evoke special attention and are set apart from other normative text with, like this: UAs MUST provide an accessible alternative.
Conformance classes Conformance to this specification is defined for three conformance classes: style sheet A. Renderer A that interprets the semantics of a style sheet and renders documents that use them. Authoring tool A that writes a style sheet. A style sheet is conformant to this specification if all of its statements that use syntax defined in this module are valid according to the generic CSS grammar and the individual grammars of each feature defined in this module. A renderer is conformant to this specification if, in addition to interpreting the style sheet as defined by the appropriate specifications, it supports all the features defined by this specification by parsing them correctly and rendering the document accordingly. However, the inability of a UA to correctly render a document due to limitations of the device does not make the UA non-conformant. (For example, a UA is not required to render color on a monochrome monitor.) An authoring tool is conformant to this specification if it writes style sheets that are syntactically correct according to the generic CSS grammar and the individual grammars of each feature in this module, and meet all other conformance requirements of style sheets as described in this module.
Requirements for Responsible Implementation of CSS The following sections define several conformance requirements for implementing CSS responsibly, in a way that promotes interoperability in the present and future. Partial Implementations So that authors can exploit the forward-compatible parsing rules to assign fallback values, CSS renderers must treat as invalid (and ) any at-rules, properties, property values, keywords, and other syntactic constructs for which they have no usable level of support. In particular, user agents must not selectively ignore unsupported property values and honor supported values in a single multi-value property declaration: if any value is considered invalid (as unsupported values must be), CSS requires that the entire declaration be ignored. Implementations of Unstable and Proprietary Features To avoid clashes with future stable CSS features, the CSSWG recommends for the implementation of features and to CSS. Implementations of CR-level Features Once a specification reaches the Candidate Recommendation stage, implementers should release an implementation of any CR-level feature they can demonstrate to be correctly implemented according to spec, and should avoid exposing a prefixed variant of that feature. To establish and maintain the interoperability of CSS across implementations, the CSS Working Group requests that non-experimental CSS renderers submit an implementation report (and, if necessary, the testcases used for that implementation report) to the W3C before releasing an unprefixed implementation of any CSS features. Testcases submitted to W3C are subject to review and correction by the CSS Working Group.
Further information on submitting testcases and implementation reports can be found from on the CSS Working Group’s website at. Questions should be directed to the mailing list.