Guide on importing XRegExp into an Angular 2 project

Question

Guide on importing XRegExp into an Angular 2 project

I'm trying to integrate the XRegExp library into an Angular2 application using TypeScript.

After successfully installing XRegExp as a node.js module, I am facing issues with getting

var unicodeWord = XRegExp("^\\pL+$");

to function within a component method.

(How can I properly reference the JS library in TypeScript? How do I go about loading the node.js module in my Angular project?)

UPDATE

In my typings.json file:

{
    "ambientDependencies": {
        "es6-shim": "github:DefinitelyTyped/DefinitelyTyped/es6-shim/es6-shim.d.ts#6697d6f7dadbf5773cb40ecda35a76027e0783b2",
        "jasmine": "github:DefinitelyTyped/DefinitelyTyped/jasmine/jasmine.d.ts#d594ef506d1efe2fea15f8f39099d19b39436b71",
        "xregexp": "github:DefinitelyTyped/DefinitelyTyped/xregexp/xregexp.d.ts"
    }
}

Within the <head> tag of my index.html:

<head>
    <title>Amadeus</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">    

    <!-- 1. Load libraries -->
    <!-- Required polyfills for IE -->
    <script src="node_modules/es6-shim/es6-shim.min.js"></script>
    <script src="node_modules/systemjs/dist/system-polyfills.js"></script>

    <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script src="node_modules/rxjs/bundles/Rx.js"></script>
    <script src="node_modules/angular2/bundles/angular2.js"></script>

    <!-- 2. Configure SystemJS -->
    <script>
        System.config({
            paths: {
                xregexp: 'node_modules/xregexp/src/xregexp.js'
            },
            packages: {        
                angular_components: {
                    format: 'register',
                    defaultExtension: 'js'
                }
            }
        });

        System.import('angular_components/ignition')
            .then(null, console.error.bind(console));
    </script>

</head>

For ignition.ts:

import {bootstrap}    from 'angular2/platform/browser'
import {AmadeusComponent} from './amadeus/amadeus.component'

bootstrap(AmadeusComponent);

And in amadeus.component.ts:

import {Component} from 'angular2/core';
import {XRegExp} from 'xregexp';

@Component({
    selector: 'amadeus',
    templateUrl: 'angular_components/amadeus/amadeus.component.ahtml'
})

export class AmadeusComponent {

    constructor(){
        console.log(XRegExp); // undefined
    }

}

typescript angular xregexp

Answer 1

Answer №1

Follow these steps to achieve the desired outcome:

To begin, add 'typings' as a development dependency in your package.json file, and optionally include a post-installation action:

"devDependencies": 
{
    "typings": "latest"
},
"scripts": 
{
    "postinstall": "typings install --save"
}

Create a typings.json file with the specified content in your project's root directory:

{
  "ambientDependencies": {
    "xregexp": "github:DefinitelyTyped/DefinitelyTyped/xregexp/xregexp.d.ts"
  }
}

Next, navigate to your project's root folder in the console (where package.json, tsconfig.json, etc., are located) and execute the following command:

npm install

This will fetch TypeScript definitions for the xregexp library.

Remember to exclude browser (or main) definitions by using the exclude section in your tsconfig file like this:

{ 
    "compilerOptions": { 
        "emitDecoratorMetadata": true, 
        "experimentalDecorators": true,
        "moduleResolution": "node",
        "module": "commonjs", 
        "target": "es6",
        "sourceMap": true,
        "outDir": "bin",
        "declaration": true
    },
    "exclude": [
        "node_modules",
        "typings/browser.d.ts",
        "typings/browser/**"
    ]
}

Configure your systemjs setup accordingly:

System.config({
 paths: {
     xregexp: 'path/to/xregexp.js'
 }             
});

System.defaultJSExtensions = true;

Finally, import and utilize it as shown below:

import XRegExp = require('xregexp');

We hope this guide proves helpful.

Answer 2

Follow these steps to achieve the desired outcome:

To begin, add 'typings' as a development dependency in your package.json file, and optionally include a post-installation action:

"devDependencies": 
{
    "typings": "latest"
},
"scripts": 
{
    "postinstall": "typings install --save"
}

Create a typings.json file with the specified content in your project's root directory:

{
  "ambientDependencies": {
    "xregexp": "github:DefinitelyTyped/DefinitelyTyped/xregexp/xregexp.d.ts"
  }
}

Next, navigate to your project's root folder in the console (where package.json, tsconfig.json, etc., are located) and execute the following command:

npm install

This will fetch TypeScript definitions for the xregexp library.

Remember to exclude browser (or main) definitions by using the exclude section in your tsconfig file like this:

{ 
    "compilerOptions": { 
        "emitDecoratorMetadata": true, 
        "experimentalDecorators": true,
        "moduleResolution": "node",
        "module": "commonjs", 
        "target": "es6",
        "sourceMap": true,
        "outDir": "bin",
        "declaration": true
    },
    "exclude": [
        "node_modules",
        "typings/browser.d.ts",
        "typings/browser/**"
    ]
}

Configure your systemjs setup accordingly:

System.config({
 paths: {
     xregexp: 'path/to/xregexp.js'
 }             
});

System.defaultJSExtensions = true;

Finally, import and utilize it as shown below:

import XRegExp = require('xregexp');

We hope this guide proves helpful.

Guide on importing XRegExp into an Angular 2 project

Answer №1

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