Start with components open sap ui5

So, first steps!
1 Go to https://openui5.org/releases/
and
2 load the last openui5 release!
3 after that just use it:
<!DOCTYPE html> <html> <head> <meta http-equiv='X-UA-Compatible' content='IE=edge' /> <title>Hello World</title> <script id='sap-ui-bootstrap' src='[INSTALLATION LOCATION]/resources/sap-ui-core.js' data-sap-ui-theme='sap_belize' data-sap-ui-libs='sap.m'></script> <script> var btn = new sap.m.Button({ text:'Hello World', press:function(){alert('Hello!');} }); btn.placeAt('content'); </script> </head> <body id='content' class='sapUiBody'> </body> </html>
So, and it didn’t work!
You can solved it 2 ways:
1 use <script src=»https://openui5nightly.hana.ondemand.com/resources/sap-ui-core.js»>
2 You need use web server!
for chrome use Web Server for Chrome
and that you need choose folder with you app and release!
So, now it will work!