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Wijmo Core requires modern browsers (IE9 or better) to leverage the following technologies:

• ECMAScript 5: The ECMAScript 5 standard adds support for property getters and setters. This may seem like a small change, but it makes a huge difference. The ECMAScript 5 standard adds many other significant enhancements, like the bind method that allows you to specify the value of the 'this' parameter in your callbacks. There are also new array methods that can save a lot of time.
• SVG: Modern browsers implement SVG, which makes it easier to create amazing visual representations of your data. Wijmo leverages SVG directly, without the overhead that would be required if it had to support legacy browsers.
• TypeScript: Wijmo is written in TypeScript, taking advantage of type-checking and OOP concepts such as modules, classes, and inheritance. The output is still pure JavaScript, so you can use either language in your own development work.
• Mobile Devices: Wijmo was designed with mobile browser support built in from the start. Responsive layouts and touch support were major considerations in the design and implementation of every Wijmo control.
• Angular: AngularJS is one of the most popular and powerful JavaScript application frameworks today. Wijmo has supported Angular 1.x since it was released, and Angular 2 even before it was released.
• Other frameworks: You can use Wijmo with any other JavaScript frameworks you like. In addition to AngularJS and Angular, Wijmo ships interop modules for React & Vue.
• Bootstrap: Bootstrap is one of the easiest, most powerful, and most popular CSS frameworks available. Used in Wijmo samples and on-line documentation. If you use Bootstrap, be assured that Wijmo will blend right in with no extra effort required on your part.

ComponentOne realize that some scenarios require support for legacy browsers (Internet Explorer 8 and earlier). For that reason, they will continue to maintain versions of the original Wijmo (Wijmo 3(Professional)) for as long as customers require it. If you need to support IE8 and earlier, keep using the original Wijmo. ComponentOne will maintain and support it as usual. If you are ready to move to HTML5 and modern browsers then it is recommended that you use Wijmo 5.

Wijmo 3 requires internet Explorer 6 or better.