error on load RestClient on Azure devops extension dev - azure-devops

Question

Im new in extensión dev for #azure #DevOps, I already publish one, the extensión by now can save and get documents via
VSS.getService(VSS.ServiceIds.ExtensionData).then(function (
dataService: any
) {...});
I want to get all teams from the project,and I have 2 problems, First I try to import the Rest client like this:
import RestClient = require("TFS/WorkItemTracking/RestClient");
But, When I upload to azure Devops and display the page in the consle say:
index.js:1 Uncaught ReferenceError: define is not defined
at index.js:1:1
Second I dont relly know how to use the getTeams function, I try this, but I can not test it, If u could give me an example would be great
var client = RestClient.getClient();
client.getTeams(VSS.getWebContext().project.id).then(function(getTeams){console.log(getTeams)})
I try another API and it works like this:
VSS.require(["VSS/Service", "TFS/WorkItemTracking/RestClient"], function (VSS_Service:any, TFS_Wit_WebApi:any) {
// Get the REST client
var witClient = VSS_Service.getCollectionClient(TFS_Wit_WebApi.WorkItemTrackingHttpClient);
// ...
console.log("obtiene cliente")
witClient.getWorkItems(/* some work item IDs */ [1,2,3,4], ["System.Title"]).then(
function(workItems:any) {
console.log(JSON.stringify(workItems));
});
});
But, It doesnt work when I try my first aproach, like this:
import RestClient = require("TFS/WorkItemTracking/RestClient");
I try to check my config files but dont know what to do, I have this in my package.json
"dependencies": {
"vss-web-extension-sdk": "^5.141.0"
},
and in my file tsconfig.json
{
"compilerOptions": {
"target": "es5",
"lib": ["es5",
"es6",
"dom"],
"module": "amd",
"types": ["vss-web-extension-sdk"],
"moduleResolution": "node",
"esModuleInterop": true,
"forceConsistentCasingInFileNames": true,
"strict": true,
"skipLibCheck": true
}