Angular 1.x allowed to put elements in HTML, which were not known for W3C HTML Validator. Workaround for this was to add
You have to use the canonical form. The
* is for structural directives which can be used with the
<template> tag. With
* the template is implicit, but you can always use an explicit template tag instead and with this the canonical forms of the bindings you listed above.
* and <template> in https://angular.io/docs/ts/latest/guide/template-syntax.html