Understanding "this" keyword in Javascript & React

This blog helps you understand the 'this' keyword in JavaScript and using it effectively.

Monitor Form Changes

All of us have e-forms in our apps, it is an effective tool for gathering information of and from the users. A user fills the e-form and saves the same. Many-a-times, we need to monitor if the user has modified the form contents after once saving the form. Found a plugin that monitors form changes. Add the following code to .js file: (function ($) { $.fn.watchChanges = function () { return this.each(function () { $.data(this, 'formHash', $(this).serialize()); }); }; $.fn.hasChanged = function () { var hasChanged = true; this.each(function () { var formHash = $.data(this, 'formHash'); if (formHash == $(this).serialize()) { hasChanged = false; return true; } }); return hasChanged; }; }).call(