Expand Collapse Panel in Angular Without Material UI: A Custom Solution

To create an expand collapse panel in Angular without Material UI, you'll need to use a custom solution. This approach involves creating a custom component that can be toggled open or closed.

One way to achieve this is by using a simple toggle button and a container element to hold the content. The button and content can be wrapped in a single component, which can be toggled using a boolean property.

By using a custom component, you can have full control over the design and functionality of the expand collapse panel. This is especially useful if you need to match the design of your application with a specific theme or style.

In Angular, you can use the ngClass directive to add or remove classes based on the state of the toggle button. This allows you to easily switch between the open and closed states of the panel.

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Planning is crucial when building an accordion component in Angular. We need a main parent container to accommodate all the different items inside.

Each item will contain a header and a content part. The content part is dynamic, so we don't have to worry about it.

We start with the directives first, as most of them will be used as selectors and won't have any logic inside them.

Directives to be used as selectors include default header with title and toggle icon, default header with custom title, and completely custom header.

Here are the different types of headers we'll be using:

We inject the TemplateRef so that we can get access to the template reference of the host elements where these directives are placed.

To create the accordion component, you'll need to generate a new component using Angular CLI.

The structure of the component might look like this: Accordion Parent ComponentAccordion Item DirectiveAccordion Header DirectiveAccordion Title DirectiveAccordion Content Directive

Inside the accordion component, you'll define a template for the panel sections and integrate the animations. This template will use ngFor to loop through the sections, each representing a panel in the accordion.

The toggle function will control whether the panel is expanded or collapsed based on user input, and the getToggleState function will be used to determine the current state of the panel.

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Creating a smooth and engaging user experience is crucial for any application. You can achieve this by using animations and effects in your expand collapse panel.

To keep your code organized, it's a good practice to create a separate file for the accordion animations. This is similar to how Angular developers manage reusability by creating custom directives for handling repetitive tasks.

By defining the expand Collapse trigger in a dedicated file, you can easily handle animations across multiple components. The trigger manages the panel's height during expansion and collapse, transitioning between a collapsed state (height of 0px) and an expanded state (height auto).

The animation state changes based on user interaction, with the toggle function controlling whether a panel expands or collapses. This design is somewhat similar to how Angular developers resolve dynamic issues, such as Full-calendar module loading, by handling state changes efficiently.

To make the accordion functional, you'll need to bind the expand Collapse animation to each panel dynamically. This can be achieved by declaring an array of sections where each object holds the title, content, and expanded state.

The toggle function changes the expanded state for the clicked section, triggering the expand Collapse animation. This method allows each section to expand or collapse independently, ensuring a smooth user experience.

For a seamless animation, you'll need to add the animation trigger to the div and pass the state based on the expanded condition. This gives you a smooth animation when toggling the panel.

By integrating animations into your accordion component, you can create a visually appealing and user-friendly interface. The structure of the component might look something like this:

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Imagine having a sleek and functional application with a side navigation menu that can collapse effortlessly.

Such dynamic navigation options can greatly enhance the user experience and provide a more flexible layout for your application.

To achieve this, we can use a component that defines two areas: one for the sidenav and one for the content. The sidenav area occupies 40% of the available space and has an order of 1.

The sidenav area's visibility is determined by a variable called "keepLeft". The content area also occupies 40% of the space and has an order of 2, but it's always visible.

This HTML structure provides the necessary foundation for creating a collapsible sidenav with resizable split screen functionality.