bind:value

An extremely common pattern when handling input is to tie the value of an <input> or <textarea> to a variable in javascript

const TextInput: Component<{},{
	textvalue: string
}> = function() {
	this.textvalue = "Preset text..."
	return (
		<div>
			<input bind:value={use(this.textvalue)} />
			value of input is: {use(this.textvalue)}
		</div>
	)
}

Remember that bind always goes 2 ways. Whenever you assign the value of this.textvalue the input will update, and whenever the user types into the input field the value of this.textvalue will update. You can also use this for <textarea>

bind:checked

Same thing as bind:value but specifically for checkboxes

const CheckBox: Component<{},{
	ischecked: boolean
}> = function() {
	this.ischecked = true
	return (
		<div>
			<input type="checkbox" bind:checked={use(this.ischecked)} />
		</div>
	)
}