A simple HTML5/JS demo that uses Recorder.js to record audio as wav and pause/resume the recording process.
Update: I've added the ability to upload/POST the file using a plain XMLHttpRequest. I've seen many demos using $.ajax() but you need jQuery for that.
The demo works on both mobile - including Safari 11 - and desktop browsers. I've taken great care to make the demo easy to use on both screens types.
Blog post: https://addpipe.com/blog/using-recorder-js-to-capture-wav-audio-in-your-html5-web-site/
Live demo: https://addpipe.com/simple-recorderjs-demo/