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Top JavaScript TreeGrid libraries in 2020-2021

We will look at the ToP 5 TreeTable web widgets that you can freely download and use in your work. Top JavaScript TreeGrid libraries in 2020-2021.

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TOP JavaScript TreeGrid libraries in 2020-2021

The article will cover one of the most complex interface elements for web applications: ​JavaScript TreeGrid​. It will be of interest to front-end developers and novice JavaScript programmers developing business applications and solutions for working with rich data.

From this material, you will learn about ready-made TreeGrid solutions, their purpose, and application methods. At the end of the article, we will look at the TOP 5 TreeTable web widgets that you can freely download and use in your work.

Using ready-made JavaScript components significantly speeds up the development process and allows you to avoid unwanted errors. We will look at the products of Webix.com, Treegrid.com, jQuery.com, DHTMLX.com, and Sencha.com.

What is it?

Let’s start by defining what a TreeGrid or TreeTable is. It is a way of arranging table data in the form of a list of hierarchical tables. Traditionally, TreeGrid allows developers to create tree-like lists where entire tables are used as “branches.”

The TreeTable component has appeared as a logical response to the complexity of working with the UI trees. On another one hand, TreeTable is a classic DataGrid that allows you to conveniently present information in the form of a table. On the other hand, it performs tree-like hierarchical grouping of table data in the same way as the Tree widget.

Do not confuse the TreeTable component with the grouping of rows and columns used in DataGrid.

Grouping columns

Pic.1 Grouping columns

This mechanism is available in some advanced UI widgets, such as ​SpreadSheet JS​, where rows and columns are grouped in an Excel manner. But TreeTable is a more complex solution, as it groups not only separate data but also entire arrays of information. In addition to that, it displays table data in a hierarchical subordination and control elements to view this structure.

A TreeGrid tree table

Pic.2 A TreeGrid tree table

Application areas of TreeTable

Such interface solutions are in demand in the areas related to:

  • Big-Data;
  • Analytical systems;
  • Financial statistics;

Any industry or business task that contains rich data can use this solution. A key sign that analysts and developers should pay their attention to the TreeTable components is the so-called “data rhythm.”

When data is grouped, for example, by date, in this case, there is a prerequisite for working with three-dimensional arrays of information, which is quite challenging to implement in practice, but it is possible using TreeGrid.

Example:

A good illustration of the demand for TreeTable in applied tasks with big data is the speech of the developer and former Google employee ​Dan Dascalescu​. At a conference in San Francisco, he presented a prototype analytical system, the core of which was TreeGrid.

Dan Dascalescus prototype analytical system

Pic.3 Dan Dascalescu’s prototype analytical system

The development team set an ambitious goal of creating tools for working with complex structured data. The use of the TreeGrid component allowed them to solve the main tasks and complete the project in a shorter period. The full version of the speech can be found at this link​.

Advantages and disadvantages of the TreeTable/TreeGrid UI component

The advantages include:

The possibility to visualize three-dimensional data arrays on a single screen, without having to switch to nested tabs.

Here we note the apparent disadvantages of this approach:

  • The user may get lost in a large number of nested tables. You can avoid this by using navigation and table management elements, such as collapsing/ expanding all data branches.
  • A large amount of data uploaded to the browser loads the client part of the system significantly and can lead to errors due to physical limitations (the maximum size of the web page, the amount of RAM).
  • Complex tables with a large number of rows and columns will be rendered slowly in the browser, so you should choose solutions optimized for rendering speed as much as possible.

The possibility to quickly navigate through large amounts of data without using filters and search queries. TreeTable is a powerful analytical tool in the hands of an experienced user.

Disadvantages that analysts mention:

  • The complexity of working with “end-to-end data,” in cases when TreeTable can combine tables with different structures.
  • It is not possible to build a pivot table.

The opportunity to combine data of different formats in the same table when the nested table has a structure different from the “parent” table.

1. Webix TreeTable Widget

This is one of the most professional and functional widgets in this review. The Webix JavaScript TreeTable​component is based on the Webix DataGrid widget. At the moment of writing this review, it has the highest performance web control and shows the best rendering speed on the market. On the GitHub portal, you can find the ​benchmark conducted by the developers of Bryntum, where the Webix DataGrid leads in all points.

Webix developers have paid great attention to the design. Unlike most component libraries, Webix carefully studies the design of each widget.

Webix TreeTable contains a large number of features: embedded chart lines (SparkLines), clipboard support, advanced data filters, various data grouping methods like rowspan, colspan, and grid grouping. The widget boasts a thorough elaboration of drag-n-drop separately for rows and columns, the ability to change the width of all fields, and create vertical headers.

Price​: this component is distributed free of charge under the GPL license. If you need an MIT license and access to the support service, you can purchase a commercial license, prices for which start from $199.

Webix TreeGrid

Pic.4 Webix TreeGrid

2. TreeGrid

Editable JavaScript Tree Grid​ is a DHTML component that allows you to display and edit data in a grid, table, grid tree, tree view, or histogram on an HTML page. This is a fast AJAX grid with many advanced features such as advanced formulas and cell calculations; multi-level.

Pivot tables; creating Gantt charts; displaying and updating custom JavaScript objects and external objects such as Adobe Flash, Microsoft SilverLight; various editing masks; a calendar component; bulk cell changes; exporting to MS Excel or other spreadsheets that handle XLS, XLSX, CSV, or HTML table files; localization to any languages; and many other features.

The TreeGrid component allows you to load data in XML & JSON formats. The widget is available under the Basic, Standard, Personal, and Grand licenses.

Price​: free and open-source version. Commercial licenses start at $ 79 / a component.

TreeGrid component

Pic.5 TreeGrid component

3. jQuery TreeTable

jQuery Tree Table ​is a plugin for the jQuery JavaScript library. This component unobtrusively displays the tree as an HTML table. The widget allows you to create several columns to display additional information besides the tree. The tree depth can be unlimited.

jQuery TreeTable is produced by Ludo van den Boom and is available under the GPLv2 and MIT licenses. In general, the jQuery JS library is high-speed and light, which significantly simplifies the web development process. It contains easy-to-use APIs that several browsers support.

Price​: free and open-source version.

jQuery TreeGrid 

Pic.6 jQuery TreeGrid

4. The DHTMLX TreeGrid component​

DHTMLX Treegrid ​is an extension of the dhtmlxGrid component that complements the functionality of the powerful data grid with extensible strings, competent XML parsing, elegant rendering, and pagination support. Based on AJAX, the Treegrid JavaScript component with dynamic loading is capable of displaying an unlimited number of rows and processing large amounts of data on the fly.

It provides end-users with convenient built-in editing, advanced dragging of rows and columns, split mode, sorting and coloring of posts, and several mathematical formulas. Also, dhtmlxTreeGrid can be easily styled using CSS and built-in skins. It is available as part of the ​dhtmlxSuite​JavaScript UI framework or as a standalone component within the Professional version.

Price​: free and open-source version. Commercial licenses start at $ 79 / a component.

DHTLMX TreeGrid 

Pic.7 DHTLMX TreeGrid ​

5. Sencha Tree Grid Widget​

Sencha ​has a JavaScript framework that provides several ready-made UI (user interface) components for creating high-load, cross-platform web applications. One of the essential elements of this library is its high-performance Tree Grid widget.

This component has such features as sorting, multiple headers, filtering, keyboard navigation, preloading nodes with a single AJAX request, hiding / displaying / reorganizing / resizing the header, custom icons, and so on. Sencha Ext JS is available under the name of GNU GPLv3 and Commercial licenses.

Price​: free and open-source version. Commercial licenses start at $ 1295 / a package.

Sencha TreeGrid 

Pic.8 Sencha TreeGrid

Let’s compare the key features of the JavaScript mentioned above TreeTable widgets.

Parameters that we have used for comparison:

  • Fully editable – the ability to edit data on the client-side, directly in the browser;
  • Saving current state – saving data and table status when the browser is restarted, or the session is terminated;
  • Selection modes – a variety of methods for selecting data (multi-select, using the mouse and keyboard);
  • Data export – the ability to export data;
  • Checkboxes – built-in Checkboxes support;
  • Filtering – the presence of filters for selecting the necessary data;
  • Clipboard – clipboard support (one of the editing features);
  • Sparklines – built-in graphs for data series.

Comparison table of the components overview

Pic.9 Comparison table of the components overview

As you can see from the table, some developers have gone much further, offering a complete UI solution for working with data.

Conclusion

The main purpose of the TreeGrid JavaScript component is to combine tree and table functions in a single widget. In this article, we have reviewed the TOP 5 JavaScript Tree Grid widgets.

All are their remarkable functions and characteristics. Based on the comparison diagram, the DXTMLX and Webix JS libraries are the most versatile TreeGrid widgets that help integrate the tree into an editable grid, making it easier to work with large amounts of data.

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Can the UK Host Europe’s First Spaceport?

In the race to launch the first rocket from Europe, can the UK come out on top? With the plans for two new UK spaceports based in Scotland underway, these may present Great Britain’s best chance of success.

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Can the UK Host Europes First Spaceport

The United Kingdom can boast an enviable record of excellence with its contributions to science, engineering, and technology, especially in the field of aeronautics. Therefore, it’s surprising that Great Britain hasn’t yet achieved a vertical rocket launch from the country’s soil, despite the abundance of scientific expertise in its space industry.

Now, the United Kingdom is targeting 10% of the worldwide space industry by 2030, and its success in the endeavor is likely to hinge on the progress of two new UK spaceports.

1. Spaceport Development in the UK

Despite the difficulties posed by the coronavirus pandemic and the continuing fallout from Brexit, the UK is still aiming to build new spaceports on British soil very shortly. The government and space industry hope to boost British enterprise, provide a platform for the nation’s scientific talent, and secure considerable economic benefits.

UK science minister Amanda Solloway stated that the new UK spaceports would “cement the UK’s status as a global space superpower.” The UK already makes sizeable contributions to the global space industry with its technology exports. The annual UK satellite export market is valued at over $300 million, while more than £360 billion of broader UK economic activity is supported by satellite services.

Indeed, small satellite (smallsat) technology promises the most significant short-term growth for the space industry’s future. Many of Britain’s most innovative smallsat companies are located in Scotland, which, combined with the local geography, makes the UK’s northernmost part an ideal base of operations for developing the country’s space industry.

It’s no surprise, then, that Scotland has been chosen as the location for two different spaceports with two very different profiles. While plans for other UK spaceports in Wales and Cornwall are also in progress, if Britain launches Europe’s first vertical rocket, it will likely originate from one Scottish spaceport. Now, it continues to be discussed which will strike first: Space Hub Sutherland or the Shetland Space Centre.

2. Space Hub Sutherland vs. Shetland Space Centre

With a proposed site amidst the beautiful Scottish Highlands on the A’ Mhòine peninsula, the construction of Space Hub Sutherland is scheduled to begin soon, with an eye on launching rockets before the end of 2022. The spaceport will launch rockets carrying payloads of up to 500 kg, the first of which will be a rocket made by Orbex. Although based in Scotland, Orbex’s founders hail from Denmark and Germany, with most of Orbex’s employees working in Denmark rather than in the UK.

spacex Host Europes First Spaceport

This is not the only setback that Orbex and Sutherland Space Hub have had to weather. This is not the only setback that Orbex and Sutherland Space Hub have had to survive. Previously, the American aerospace giant Lockheed Martin had come aboard as a partner at Sutherland Space Hub. However, it seems the US company thought better of the decision, as they have now turned their efforts to the Shetland Space Centre instead.

The original design for the spaceport included two vertical launchpads to enable up to 30 launches every year. However, due to ecological restrictions, the spaceport has been limited to a single launch pad and a maximum of 12 launches every year. It is also unclear why Orbex would have sought a bailout loan despite having secured millions in investment for the project.

Other objections to the Sutherland spaceport have come from Danish billionaire and the richest man in Scotland, Holch Povlsen. The emigrant entrepreneur has cited environmental concerns that conflict with the work done by his Wildland firm, which aims to rewild the Scottish Highlands. However, it’s also worth noting that Povlsen has a £1.4 million stake in the competing Shetland Space Centre, which he argues has more potential for success.

Shetland Space Centre is also looking to be up and running with its first rocket launch by the end of 2022, from a site in Lamba Ness on Unst, one of the Shetland Islands. The plans boast three launchpads capable of launching payloads of up to 1,000 kg for up to 30 launches every year. Lockheed Martin is partnering with space technology firm ABL Space Systems for a series of maiden launches from the spaceport.

Although the project promises to contribute £5 million to the local economy, planning approval has yet to be granted. The preferred site will require the demolition of a Second World War radar facility, which Historic Environment Scotland has argued is too high a price to pay. Suggested suitable alternatives could easily be found elsewhere.

3. When Will UK Spaceports Be Operational

The coronavirus pandemic has caused mass disruption to almost every industry on Earth, and the commercial space sector is no different. That said, the global space industry continued to grow in 2020, which is perhaps a testament to the sector’s future-proof potential. Suppose the UK is serious about leveraging its space industry to acquire a share of this market.

In that case, UK spaceports will have to be constructed before long, especially if Great Britain wants to realize its ambitions of becoming the first European nation to play host to a vertical rocket launch. Meanwhile, on the continent, countries such as Germany, Sweden, France, Norway, and Portugal, are all working towards making their space industries sufficiently competitive to increase their global market shares.

What are the uses of satellites

  • Television
  • Telephones
  • Navigation
  • Space science
  • Weather
  • Environmental monitoring
  • Safety
  • Land stewardship

4. Conclusion: Healthy Competition

The UK spaceports planned for Scotland both face their own set of challenges. Neither the Shetland Space Centre nor Sutherland Space Hub will find themselves wanting for customers if one or both of them can demonstrate the capacity for successful vertical rocket launches. However, the presence of two different spaceports in Scotland can only help to improve Britain’s overall ability for commercial space launches that are likely to make the country an attractive proposition for future investment.

The global satellite market proliferates as more and more industries rely on satellite technology to stay competitive. If these UK spaceports can establish themselves as Europe’s premier launch facilities, both the spaceport developers and the broader British economy are sure to reap the benefits.

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