RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including ngx-formly-material-file. Try it out:
require("@angular/common/package.json"); // @angular/common is a peer dependency.
require("@angular/core/package.json"); // @angular/core is a peer dependency.
require("@angular/cdk/package.json"); // @angular/cdk is a peer dependency.
require("@angular/material/package.json"); // @angular/material is a peer dependency.
require("@ngx-formly/core/package.json"); // @ngx-formly/core is a peer dependency.
require("@ngx-formly/material/package.json"); // @ngx-formly/material is a peer dependency.
var ngxFormlyMaterialFile = require("ngx-formly-material-file")
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require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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