Ember.js Ember.Templates.helpers has-block-params() Method

Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.

The has-block-params() method is used to indicate if the component is invoked with params. 

Syntax:

has-block-params(the)

Parameters: 

• the: It is the name of the block which is invoked. 

Return: Boolean ‘true’ if the component was invoked with block params.

Steps to Install and Run Ember.js:

Step 1: To run the following examples, you need to have an ember project. To create one, you will need to install ember-cli first. Write the below code in the terminal:

npm install ember-cli

Step 2: Now, you can create the project by typing in the following piece of code:

ember new <project-name> --lang en

To start the server, type:

ember serve

Example 1: Type the following code to generate the route for this example:

ember generate route has1

app/components/compact2.hbs

HTML

{{#if (has-block-params)}}
    <h2>
          Welcome {{yield this.favoriteFlavor}},
          This Component with Params.
      </h2>
{{else}}
    <h2>
          Welcome {{yield}}, This Component without Params.
      </h2>
{{/if}}

app/templates/has1.hbs

HTML

<Compact2 as |favoriteFlavor|>
    Sam
</Compact2>
<Compact2>
    Geeks
</Compact2>

Output:

Ember.js Ember.Templates.helpers has-block-params() Method

Example 2: Type the following code to generate the route for this example:

ember generate route has2

app/components/compact.js

HTML

{{#if (has-block-params)}}
    <h2>
        This Component is invoke with params.
    </h2>
{{else}}
    <h2>
        {{yield}}
        This block of  component invoke without params.
    </h2>
{{/if}}

app/templates/has2.hbs

HTML

<Compact as |params|>
    Hi Geeks
</Compact>
<Compact>
    Hi coders
</Compact>
{{outlet}}

Output:

Ember.js Ember.Templates.helpers has-block-params() Method

Reference: https://api.emberjs.com/ember/4.4/classes/Ember.Templates.helpers/methods/action?anchor=has-block-params