Safely Seed Your Vue Components with Blade Double-encoding

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Safely Seed Your Vue Components with Blade Double-encoding image

Editors Note: As of Laravel 5.6 this is no longer needed!

You can easily embed JSON data in your Vue components with a new Blade double-encoding method. If you use Vue components with a server-side application like Laravel, chances are that you’ve seeded Vue components with some JSON data or user-generated content (UGC) that looks something like the following:

@extends('layout')
@section('content')
 
<div id="app">
<example-component
:example-data="{{ json_encode([
'wrestler_name' => '"Mercenary" Keith Anderson'
]) }}"
>
</example-component>
</div>
 
@endsection

Unfortunately, if your data has HTML entities, your Vue application will get stopped dead in its tracks.

As of Laravel 5.5.29, Taylor Otwell introduced a doubleEncode() method to the Blade compiler, which solves this issue easily.

Adam Walthan Tweeted about how to use double-encoding with this example:

???? If you ever seed your Vue components with JSON data in your Blade templates, you *definitely* want to enable double-encoding.

Without it, a rogue "&quot;" in any user-submitted data might blow up your front end! pic.twitter.com/kifQ3ksv6H

— Adam Wathan (@adamwathan) January 19, 2018

Fortunately, it’s easy to remedy by adding the new Blade::doubleEncode() method in your AppServiceProvider::boot() method:

class AppServiceProvider extends ServiceProvider
{
/**
* Bootstrap any application services.
*
* @return void
*/
public function boot()
{
Blade::doubleEncode();
}
}

The original <example-component> example I shared would now look like the following with double-encoding:

I’ve fought with seeding Vue components with JSON data, and it’s nice that Laravel can automatically make this stuff so much easier to deal with now!

Paul Redmond photo

Staff writer at Laravel News. Full stack web developer and author.

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