The virtual DOM — DOM manipulation is the heart of the modern, interactive web unfortunately it also a lot slower than most Javascript operations. var commnetBox = React.createClass({ render: function(){ return ( <div className = "commentBox"> Hellow, world! I am a commentBox. </div> ); } }); JSX JSX allows us to write HTML elements in…

When executing javascript code, different errors can occur. Errors can be coding errors made by the programmer, error due to wrong input, and other unforeseeable things try and cath The try statement allows you to define a block of code to be tested for errors while it is being executed. The catch statement…

String.prototype.chartAt() The chartAt() returns a new string method of single code located specified offset the string chartAt(index) Example const word = "hellow new wordl"; console.log("The world at index is '+ word.chartAt() + '"); Run your terminal or console tab see your results String.prototype.replace() The replace() method returns a new string with some or…