@nativescript-community/ui-label

Alternative to the built-in NativeScript Label but with better performance and additional features such as HTML rendering and more.

iOS Demo	Android Demo

Table of Contents

• Installation
  • Production build
• Configuration
  • Angular
  • Vue
  • Properties
• Improvements
  • Examples:
• Demos and Development
  • Repo Setup
  • Build
  • Demos
• Contributing
  • Update repo
  • Update readme
  • Update doc
  • Publish
  • modifying submodules
• Questions

Installation

Run the following command from the root of your project:

ns plugin add @nativescript-community/ui-label

Production build

If you are using proguard on Android build you need ensure some resource from this plugin are not minified. You need to add tools:keep="@layout/ns_*" as explained here

Configuration

It works exactly the same way as the {N} plugin. However it adds a few improvements

Angular

import { registerElement } from '@nativescript/angular';

registerElement('HTMLLabel', () => require('@nativescript-community/ui-label').Label);

<!-- Normal Label Usage -->
<HTMLLabel html="<b>Hello, I am BOLD!></b>" fontFamily="OpenSans" fontSize="16" margin="2 5 5 5" textWrap="true"></HTMLLabel>

<!-- Clickable Link Usage -->
<HTMLLabel
    [html]="someBindedUrl"
    linkColor="#336699"
    linkUnderline="true"
    (linkTap)="onLinkTap($event)"
    fontFamily="OpenSans"
    fontSize="16"
    margin="2 5 5 5"
    textWrap="true"
></HTMLLabel>

import { Utils } from '@nativescript/core';

export someComponentClass() {
    someBindedUrl = '<a href=\"https://youtube.com\">Open Youtube.com</a>'

    // Event binded to the linkTap function on the HTMLLabel
    onLinkTap(args) {
        const link = args.link;
        // expected to be https://youtube.com from the binded `<a>` tag href value
        // be sure to encodeURIComponent of any query string parameters if needed.
        Utils.openUrl(link);
    }
}

Vue

import Vue from 'nativescript-vue';

Vue.registerElement('HTMLLabel', () => require('@nativescript-community/ui-label').Label);

<!-- Normal Label Usage -->
<HTMLLabel
    fontSize="50"
    fontFamily="Cabin Sketch,res/cabinsketch"
    width="100%"
    paddingTop="5"
    color="#336699"
    textWrap="true"
    :html="someBindedValue"
    verticalAlignment="top"
/>

<!-- Clickable Link Usage -->
<HTMLLabel
    html="<a href='https://youtube.com'>Open Youtube.com</a>"
    linkColor="pink"
    linkUnderline="false"
    @linkTap="onLinkTap($event)"
    fontFamily="OpenSans"
    fontSize="16"
    margin="2 5 5 5"
    textWrap="true"
></HTMLLabel>

<script lang="ts">
import Vue from 'vue';

export default Vue.extend({
    data() {
        return {
            someBindedValue: "<p>This is really powerful. <b>Amazing to be quite honest</b></p>",
        };
    },
    methods: {
        // event binded to the linkTap on the HTMLLabel
        onLinkTap(args) {
            Utils.openUrl(args.link);
        },
    },
    beforeDestroy() {},
});
</script>

Properties

• html
  Html text that will be used to render text. HTML supported tags are a bit different on iOS and Android. To make sure it works as expected, for now only used Android supported ones.

  If using a url with parameters, be sure to encode the query string so Android can open the link accordingly.

• verticalTextAlignment
  You can also set it through css with vertical-text-alignment

• textShadow
  You can also set it through css with text-shadow. The format is offsetx offsety blurradius color

• linkColor Color for any <a> tags inside the HTMLLabel.

• linkUnderline Boolean to enable underline for any <a> tags inside the HTMLLabel.

• linkTap Event to handle taps of any <a> tags inside the HTMLLabel. Access the link property of the event data from the linkTap event. See Samples above for example.

Improvements

• Override the {N} font loading system to make it much faster
• faster creation of FormattedString
• faster label creation and drawing, especially on android

Examples:

• Basic Drawer
  • A basic sliding drawer.
• All Sides
  • An example of drawers on all sides: left, right, top, bottom.

Demos and Development

Repo Setup

The repo uses submodules. If you did not clone with --recursive then you need to call

git submodule update --init

The package manager used to install and link dependencies must be pnpm or yarn. npm wont work.

To develop and test: if you use yarn then run yarn if you use pnpm then run pnpm i

Interactive Menu:

To start the interactive menu, run npm start (or yarn start or pnpm start). This will list all of the commonly used scripts.

Build

npm run build.all

WARNING: it seems yarn build.all wont always work (not finding binaries in node_modules/.bin) which is why the doc explicitly uses npm run

Demos

npm run demo.[ng|react|svelte|vue].[ios|android]

npm run demo.svelte.ios # Example

Demo setup is a bit special in the sense that if you want to modify/add demos you dont work directly in demo-[ng|react|svelte|vue] Instead you work in demo-snippets/[ng|react|svelte|vue] You can start from the install.ts of each flavor to see how to register new demos

Contributing

Update repo

You can update the repo files quite easily

First update the submodules

npm run update

Then commit the changes Then update common files

npm run sync

Then you can run yarn|pnpm, commit changed files if any

Update readme

npm run readme

Update doc

npm run doc

Publish

The publishing is completely handled by lerna (you can add -- --bump major to force a major release) Simply run

npm run publish

modifying submodules

The repo uses https:// for submodules which means you won't be able to push directly into the submodules. One easy solution is t modify ~/.gitconfig and add

[url "ssh://git@github.com/"]
    pushInsteadOf = https://github.com/

Questions

If you have any questions/issues/comments please feel free to create an issue or start a conversation in the NativeScript Community Discord.