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