BUG: Unable to create plain text nodes

[anthonybennett]

If I pass in an undefined "sel", this line blows up, even though everything after that seems to work fine.

https://github.com/snabbdom/snabbdom/blob/master/src/h.ts#L35

[mightyiam]

According to issue creation date, you were looking at

snabbdom/src/h.ts

Lines 35 to 37 in 091dc5f

	if (sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g') {
	addNS(data, children, sel);
	}

And it seems like to this day an undefined first argument to h is not supported:

snabbdom/src/h.ts

Lines 20 to 49 in aac0233

	export function h(sel: string): VNode;
	export function h(sel: string, data: VNodeData | null): VNode;
	export function h(sel: string, children: VNodeChildren): VNode;
	export function h(sel: string, data: VNodeData | null, children: VNodeChildren): VNode;
	export function h(sel: any, b?: any, c?: any): VNode {
	var data: VNodeData = {}, children: any, text: any, i: number;
	if (c !== undefined) {
	if (b !== null) { data = b; }
	if (is.array(c)) { children = c; }
	else if (is.primitive(c)) { text = c; }
	else if (c && c.sel) { children = [c]; }
	} else if (b !== undefined && b !== null) {
	if (is.array(b)) { children = b; }
	else if (is.primitive(b)) { text = b; }
	else if (b && b.sel) { children = [b]; }
	else { data = b; }
	}
	if (children !== undefined) {
	for (i = 0; i < children.length; ++i) {
	if (is.primitive(children[i])) children[i] = vnode(undefined, undefined, undefined, children[i], undefined);
	}
	}
	if (
	sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g' &&
	(sel.length === 3 || sel[3] === '.' || sel[3] === '#')
	) {
	addNS(data, children, sel);
	}
	return vnode(sel, data, children, text, undefined);
	};

So I'm going to close this as unsupported. Text nodes can be created as children of elements using h or using vnode in this way:

snabbdom/src/h.ts

Lines 37 to 41 in aac0233

	if (children !== undefined) {
	for (i = 0; i < children.length; ++i) {
	if (is.primitive(children[i])) children[i] = vnode(undefined, undefined, undefined, children[i], undefined);
	}
	}

Or manually:

snabbdom/src/vnode.ts

Lines 13 to 20 in aac0233

	export interface VNode {
	sel: string | undefined;
	data: VNodeData | undefined;
	children: Array<VNode | string> | undefined;
	elm: Node | undefined;
	text: string | undefined;
	key: Key | undefined;
	}

Seems like it's something like { text: 'foo' } and that's it.