Based on https://github.com/deepsweet/microjungle by Kir Belevich
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/25520/241821/microjungle%20JsonML%20to%20DocumentFragment.js
// ==UserScript==
// @name microjungle JsonML to DocumentFragment
// @description Based on https://github.com/deepsweet/microjungle by Kir Belevich
// @namespace https://greasyfork.org/en/users/447-spooky-donkey
// @ecmaVersion 6
// @version 3
// @grant none
// ==/UserScript==
/*exported MicrojungleJsonMLtoDocumentFragment*/
const MicrojungleJsonMLtoDocumentFragment = function () {
"use strict";
return function frag(template, target = document.createDocumentFragment()) {
if (!Array.isArray(template)) {
return target;
}
const stringOrFinite = a => typeof a === "string" ||
(typeof a === "number" && isFinite(a));
function createElement(item, s = item[1]) {
const elem = document.createElement(item.shift());
if (!!s && s.constructor === Object) {
const attrList = item.shift();
Object.entries(attrList).forEach(([attrName, attrValue]) => {
if (stringOrFinite(attrValue)) {
elem.setAttribute(attrName, attrValue);
}
});
}
target.appendChild(frag(item, elem));
}
template.forEach(item => {
if (stringOrFinite(item)) {
target.appendChild(document.createTextNode(item));
} else if (item) {
if (typeof item[0] === "string") {
createElement(item);
} else if (item.nodeType) {
target.appendChild(item);
} else {
frag(item, target);
}
}
});
return target;
};
};