call function in object javascript code example

Example 1: javascript function call with variable

function abc() {
  alert('test');
}

var funcName = 'abc';

window[funcName]();

Example 2: calling function from function object javascript

var runApp = {

    init: function(){   
         this.run()
    },

    run: function() { 
             alert("It's running!");
    }
};

runApp.init();