The creation of web forms has always been a complex task. While marking up the form itself is easy, checking whether each field has a valid and coherent value is more difficult, and informing the user about the problem may become a headache. HTML5 introduced new mechanisms for forms: it added new semantic types for the element and constraint validation to ease the work of checking the form content on the client side. Basic, usual constraints can be checked, without the need for JavaScript, by setting new attributes; more complex constraints can be tested using the Constraint Validation API....The creation of web forms has always been a complex task. While marking up the form itself is easy, checking whether each field has a valid and coherent value is more difficult, and informing the user about the problem may become a headache. HTML5 introduced new mechanisms for forms: it added new semantic types for the <input> element and constraint validation to ease the work of checking the form content on the client side. Basic, usual constraints can be checked, without the need for JavaScript, by setting new attributes; more complex constraints can be tested using the Constraint Validation API.
Global attributes are attributes common to all HTML elements; they can be used on all elements, though they may have no effect on some elements....Global attributes are attributes common to all HTML elements; they can be used on all elements, though they may have no effect on some elements.
Globale Attribute sind Attribute, die für alle HTML-Elemente gelten; sie können auf allen Elementen verwendet werden, obwohl sie bei einigen Elementen keine Wirkung haben können....Globale Attribute sind Attribute, die für alle HTML-Elemente gelten; sie können auf allen Elementen verwendet werden, obwohl sie bei einigen Elementen keine Wirkung haben können.
Das HTML-Element fasst eine Gruppe von Tabellenzeilen (
-Elemente) zusammen und gibt an, dass diese den Hauptteil der Daten einer Tabelle darstellen....ist), dann erzeugt der Browser-Markup ein <tbody> -Element, das diese...Tabelleninhalts-Gruppen und semantischer Markups ist nicht nur nützlich für...
The modulepreload keyword, for the rel attribute of the element, provides a declarative way to preemptively fetch a module script, parse and compile it, and store it in the document's module map for later execution....The modulepreload keyword, for the rel attribute of the <link> element, provides a declarative way to preemptively fetch a module script, parse and compile it, and store it in the document's module map for later execution.
The preload value of the element's rel attribute lets you declare fetch requests in the
HTML's , specifying resources that your page will need very soon, which you want to start loading early in the page lifecycle,
before browsers' main rendering machinery kicks in. This ensures they are available earlier and are less likely to block the page's render, improving performance. Even though the name contains the term load, it doesn't load and execute the script but only schedules it to be downloaded and cached with a higher priority....The preload value of the <link> element's rel attribute lets you declare fetch requests in the
HTML's <head>, specifying resources that your page will need very soon, which you want to start loading early in the page lifecycle,
before browsers' main rendering machinery kicks in. This ensures they are available earlier and are less likely to block the page's render, improving performance. Even though the name contains the term load, it doesn't load and execute the script but only schedules it to be downloaded and cached with a higher priority.
HTML 요소는 브라우저의 제목 표시줄이나 페이지 탭에 보이는 문서 제목을 정의합니다. 텍스트만 포함할 수 있으며 태그를 포함하더라도 무시합니다....HTML <title> 요소는 브라우저의 제목 표시줄이나 페이지 탭에 보이는 문서 제목을 정의합니다. 텍스트만 포함할 수 있으며 태그를 포함하더라도 무시합니다.