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ng-lift

Automated tooling for upgrading Angular.js apps to Angular

Install

yarn global add ng-lift

or

npm install --global ng-lift

CLI

The ng-lift CLI allows automatic template upgrade. For instance:

ng-lift template my-template.html

Will transform the given Angular.js template to Angular syntax, and print the result to stdout.

You can also specify an output file name:

ng-lift template -o upgrade-template.html my-template.html

How does it work?

The template upgrade tool basically goes over all HTML elements, and looks for Angular.js specific directives, such as ng-click. It then automatically transforms them to their Angular counterpart, (click) in this example. In adddition, any references to the controller variable $ctrl are stripped (this can be customized with the --controller commandline option), and ng-repeat attributes are rewritten to the new let ... of ... format.

Example

The following input:

<div ng-repeat="user in $ctrl.users">
  <img ng-click="$ctrl.changeProfile(user)" ng-src="{{user.profileImage}}" alt="Profile Image">
  <a ng-href="{{user.profileUrl}}">{{user.name}}</a>
    <input ng-if="$ctrl.editMode" ng-model="user.bio" ng-disabled="$ctrl.readonly">
</div>

Will transform to:

<div *ngFor="let user of users">
  <img (click)="changeProfile(user)" src="{{user.profileImage}}" alt="Profile Image">
  <a href="{{user.profileUrl}}">{{user.name}}</a>
  <input *ngIf="editMode" [(ngModel)]="user.bio" [disabled]="readonly">
</div>

API

The package also exposes an API that you can use from your code:

const { upgradeTemplate } = require('ng-lift');
 
console.log(upgradeTemplate('<div ng-if="$ctrl.foo">It works!</div>'));
 
// output: <div *ngIf="foo">It works!</div>

There as also a template sniffer API, which guesses whether a given template is an Angular or AngularJS template. For instance:

const { guessAngularVersion } = require('ng-lift');
 
console.log(guessAngularVersion('<div ng-click="$ctrl.onClick()">Click me</div>'));
// output: angularjs
 
console.log(guessAngularVersion('<div (click)="onClick()">Click me</div>'));
// output: angular
 
console.log(guessAngularVersion('<div onclick="noAngular()">Click me</div>'));
// output: unknown

License

Copyright (C) 2017, 2018, Uri Shaked. Licensed under the MIT license.