How to Use Bootstrap in SPFX (SharePoint Framework)
Npm install jquery -- save npm install @types / jquery -- save npm install bootstrap -- save npm install @types / bootstrap -- save then add the following lines to your config.json file`" externals ": { " jquery ": { " path ": " node_modules / jquery / dist / jquery . min . js ", " globalName ": " jQuery " }, " bootstrap ": { " path ": " node_modules / bootstrap / dist / js / bootstrap . min . js ", " globalName ": " jQuery " }` Finally add the following lines to your web part .ts file import * as jQuery from 'jquery' ; import * as bootstrap from 'bootstrap' ;