snabbdom/build/h.js

A virtual DOM library with focus on simplicity, modularity, powerful features and performance.

import { vnode } from "./vnode.js";
import * as is from "./is.js";
export function addNS(data, children, sel) {
    data.ns = "http://www.w3.org/2000/svg";
    if (sel !== "foreignObject" && children !== undefined) {
        for (let i = 0; i < children.length; ++i) {
            const child = children[i];
            if (typeof child === "string")
                continue;
            const childData = child.data;
            if (childData !== undefined) {
                addNS(childData, child.children, child.sel);
            }
        }
    }
}
export function h(sel, b, c) {
    let data = {};
    let children;
    let text;
    let i;
    if (c !== undefined) {
        if (b !== null) {
            data = b;
        }
        if (is.array(c)) {
            children = c;
        }
        else if (is.primitive(c)) {
            text = c.toString();
        }
        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.toString();
        }
        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.startsWith("svg") &&
        (sel.length === 3 || sel[3] === "." || sel[3] === "#")) {
        addNS(data, children, sel);
    }
    return vnode(sel, data, children, text, undefined);
}
/**
 * @experimental
 */
export function fragment(children) {
    let c;
    let text;
    if (is.array(children)) {
        c = children;
    }
    else if (is.primitive(c)) {
        text = children;
    }
    else if (c && c.sel) {
        c = [children];
    }
    if (c !== undefined) {
        for (let i = 0; i < c.length; ++i) {
            if (is.primitive(c[i]))
                c[i] = vnode(undefined, undefined, undefined, c[i], undefined);
        }
    }
    return vnode(undefined, {}, c, text, undefined);
}
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