[textarea] missing icons implementation

[yinonov]

Describe the bug
textarea documents icon and trailingicon as part of its API but in practice there's no implementation

material-web/packages/textarea/mwc-textarea-base.ts

Lines 97 to 114 in 987a534

	<textarea
	aria-labelledby=${ifDefined(ariaLabelledbyOrUndef)}
	class="mdc-text-field__input"
	.value="${live(this.value) as unknown as string}"
	rows="${this.rows}"
	cols="${this.cols}"
	?disabled="${this.disabled}"
	placeholder="${this.placeholder}"
	?required="${this.required}"
	?readonly="${this.readOnly}"
	minlength="${ifDefined(minOrUndef)}"
	maxlength="${ifDefined(maxOrUndef)}"
	name="${ifDefined(this.name === '' ? undefined : this.name)}"
	inputmode="${ifDefined(this.inputMode)}"
	autocapitalize="${ifDefined(autocapitalizeOrUndef)}"
	@input="${this.handleInputChange}"
	@blur="${this.onInputBlur}">
	</textarea>`;

Expected behavior
textarea should implement icons in template

[asyncLiz]

Thanks for the bug! This is definitely a documentation issue since textarea does not have icons.

[yinonov]

couldn't find any ref to textarea in the material.io guidelines.
mind sharing the reasons?

[yinonov]

oh there's this reference pointing out textarea as a text field type