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Sencha Touch Cookbook - Second Edition by Ajit Kumar

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Extending an existing component's capability

In the previous recipe, we defined a new component and used it in our application. However, in some cases, the choice may not be to define a new component. Rather, we may have to see if we can add the capability to the existing component. For example, String is a standard object in JavaScript and we would like to add a new method, formatWithWordBreak, in such a way that, once it is added, it is available to the complete application code to make use of this new method without defining a MyString class and using it wherever we need the formatWithWordBreak method. This recipe will take us through the steps to achieve this requirement.

Getting ready

Make sure you have set up your development environment by ...

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