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@developit
Last active July 25, 2023 12:02
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var preact = require('preact');
var createRenderer = require('./preact-dom-renderer');
// set up a rendering target
var renderer = createRenderer();
// render some stuff into the internal DOM
renderer.render(preact.h(PreactApp, pageConfig));
// get a snapshot of the current HTML
console.log( renderer.html() );
var preact = require('preact');
var undom = require('undom');
/**
* Prototype stateful server renderer.
*/
var doc;
module.exports = function createRenderer() {
if (!doc) {
doc = undom();
Object.assign(global, doc.defaultView);
}
var root, parent = doc.createElement('x-root');
doc.body.appendChild(parent);
return {
render: function(jsx) {
root = preact.render(jsx, parent, root);
return this;
},
html: function() {
return serializeHtml(root);
}
};
}
function serializeHtml(el) {
if (el.nodeType===3) return esc(el.nodeValue);
var name = String(el.nodeName).toLowerCase(),
str = '<'+name,
hasClass = false,
c, i;
for (i=0; i<el.attributes.length; i++) {
let name = el.attributes[i].name;
if (name==='class') hasClass = true;
str += ' '+name+'="'+esc(el.attributes[i].value)+'"';
}
if (el.className && !hasClass) str += ' class="'+el.className+'"';
str += '>';
for (i=0; i<el.childNodes.length; i++) {
c = serializeHtml(el.childNodes[i]);
if (c) str += c;
}
return str + '</'+name+'>';
}
function esc(str) { return String(str).replace(/[&<>"']/g, escMap); }
function escMap(s) { return '&'+map[s]+';'; }
var map = {'&':'amp','<':'lt','>':'gt','"':'quot',"'":'apos'};
@feross
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feross commented Aug 10, 2017

Two issues with the code:

  1. hasClass is defined but never used.
  2. hits is never defined.

Is hits.class supposed to be hasClass?

@developit
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Author

Fixed!

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