flash.moe/assets/makai.js/elem.js

111 lines
3.4 KiB
JavaScript

const $t = document.createTextNode.bind(document);
const $er = (type, props, ...children) => $e({ tag: type, attrs: props, child: children });
const $e = function(info, attrs, child, created) {
info = info || {};
if(typeof info === 'string') {
info = {tag: info};
if(attrs)
info.attrs = attrs;
if(child)
info.child = child;
if(created)
info.created = created;
}
const elem = document.createElement(info.tag || 'div');
if(info.attrs) {
const attrs = info.attrs;
for(let key in attrs) {
const attr = attrs[key];
if(attr === undefined || attr === null)
continue;
switch(typeof attr) {
case 'function':
if(key.substring(0, 2) === 'on')
key = key.substring(2).toLowerCase();
elem.addEventListener(key, attr);
break;
case 'object':
if(attr instanceof Array) {
if(key === 'class')
key = 'classList';
const prop = elem[key];
let addFunc = null;
if(prop instanceof Array)
addFunc = prop.push.bind(prop);
else if(prop instanceof DOMTokenList)
addFunc = prop.add.bind(prop);
if(addFunc !== null) {
for(let j = 0; j < attr.length; ++j)
addFunc(attr[j]);
} else {
if(key === 'classList')
key = 'class';
elem.setAttribute(key, attr.toString());
}
} else {
for(const attrKey in attr)
elem[key][attrKey] = attr[attrKey];
}
break;
case 'boolean':
if(attr)
elem.setAttribute(key, '');
break;
default:
if(key === 'className')
key = 'class';
elem.setAttribute(key, attr.toString());
break;
}
}
}
if(info.child) {
let children = info.child;
if(!Array.isArray(children))
children = [children];
for(const child of children) {
switch(typeof child) {
case 'string':
elem.appendChild($t(child));
break;
case 'object':
if(child instanceof Element)
elem.appendChild(child);
else if(child.getElement) {
const childElem = child.getElement();
if(childElem instanceof Element)
elem.appendChild(childElem);
else
elem.appendChild($e(child));
} else
elem.appendChild($e(child));
break;
default:
elem.appendChild($t(child.toString()));
break;
}
}
}
if(info.created)
info.created(elem);
return elem;
};