aimozg

const compiler = require('vue-template-compiler');
const template = '<p>a&nbsp;b</p>';
console.log('----','template');
console.log(template);
for (let opt of ['preserve','condense',undefined]) {
	let x = compiler.compile(template, {whitespace: opt});
	console.log('\n----','whitespace:',opt);
	console.log(x.render);
	console.log(x.render.indexOf('\xA0') >=0 ? 'NBSP FOUND': 'NBSP NOT FOUND');
}

aimozg

package scratch;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.util.internal.AppendableCharSequence;

import java.nio.charset.Charset;
import java.util.regex.Matcher;
import java.util.regex.Pattern;