Add valid encoding type values for enctype/formenctype attributes

src/vs/languages/html/common/htmlTags.ts

@@ -117,14 +117,14 @@ export function getHTML5TagProvider(): IHTMLTagProvider {
 		tr: none,
 		td: ['colspan', 'rowspan', 'headers'],
 		th: ['colspan', 'rowspan', 'headers', 'scope', 'sorted', 'abbr'],
-		form: ['accept-charset', 'action', 'autocomplete:o', 'enctype', 'method:m', 'name', 'novalidate:v', 'target'],
+		form: ['accept-charset', 'action', 'autocomplete:o', 'enctype:et', 'method:m', 'name', 'novalidate:v', 'target'],
 		fieldset: ['disabled:v', 'form', 'name'],
 		legend: none,
 		label: ['form', 'for'],
-		input: ['accept', 'alt', 'autocomplete:o', 'autofocus:v', 'checked:v', 'dirname', 'disabled:v', 'form', 'formaction', 'formenctype',
+		input: ['accept', 'alt', 'autocomplete:o', 'autofocus:v', 'checked:v', 'dirname', 'disabled:v', 'form', 'formaction', 'formenctype:et',
 			'formmethod:m', 'formnovalidate:v', 'formtarget', 'height', 'inputmode', 'list', 'max', 'maxlength', 'min', 'minlength', 'multiple:v', 'name',
 			'pattern', 'placeholder', 'readonly:v', 'required:v', 'size', 'src', 'step', 'type:t', 'value', 'width'],
-		button: ['autofocus:v', 'disabled:v', 'form', 'formaction', 'formenctype', 'formmethod:m', 'formnovalidate:v', 'formtarget', 'name', 'type:bt', 'value'],
+		button: ['autofocus:v', 'disabled:v', 'form', 'formaction', 'formenctype:et', 'formmethod:m', 'formnovalidate:v', 'formtarget', 'name', 'type:bt', 'value'],
 		select: ['autocomplete:o', 'autofocus:v', 'disabled:v', 'form', 'multiple:v', 'name', 'required:v', 'size'],
 		datalist: none,
 		optgroup: ['disabled:v', 'label'],
@@ -165,6 +165,7 @@ export function getHTML5TagProvider(): IHTMLTagProvider {
 		lt: ['1', 'a', 'A', 'i', 'I'],
 		mt: ['context', 'toolbar'],
 		mit: ['command', 'checkbox', 'radio'],
+		et: ['application/x-www-form-urlencoded', 'multipart/form-data', 'text/plain'],
 		tk: ['subtitles', 'captions', 'descriptions', 'chapters', 'metadata'],
 		pl: ['none', 'metadata', 'auto'],
 		xo: ['anonymous', 'use-credentials'],