how to change font in **tradingview** library with CSS

I want to change tradingview font-family in vue.js codes

use below code in css file , but does not work

    @font-face {
      font-family: 'irsans';
      src: url('./../assets/fonts/iransansweb.eot?') format('embedded-opentype'),
        url('./../assets/fonts/iransansweb.ttf') format('truetype'),
        url('./../assets/fonts/iransansweb.woff') format('woff'),
        url('./../assets/fonts/iransansweb.woff2') format('woff2')
    }
    * { font-family: 'irsans' !important; }
    body {
      font-family: 'irsans' !important;
    }