```angular2html
npm install cyl-tools
```

```js
const cyl = require('./cyl-tools')
const now = cyl.dateFormat(new Date())
console.log(now)

const html = '<h1 title="abc"><span>123&nbsp;</span></h1>'

h = cyl.htmlEscape(html)
console.log(h)

console.log(cyl.htmlUnEscape(h))
```