What is the index of "horse" in the array below? [23, false, "cat", "horse", 0]

Suppose we have: var array = new Array(); var x = 'Value'; How can you add a value to an array in Vanilla Javascript?

In the expression y = '5' + 5;

Javascript is designed for the following purpose__________

Evaluate the result of c: var a = (NaN == NaN) ; var b = 0; var c = (a === b);

What's the output? (function(x) { return (function(y) { console.log(x); })(2) })(1);

Which is true for the code below? var object0 = {}; Object.defineProperty(object0, 'prop0', { value : 1, enumerable:false, configurable : true }); Object.defineProperty(object0, 'prop1', { value : 2, enumerable:true, configurable : false }); Object.defineProperty(object0, 'prop2', { value : 3 }); object0.prop3 = 4;

Final value of the variable apt? var apt=2; apt=apt<<2;

Which is not a valid HTML event?

Consider the following scenario: The document.write() method is embedded to write some text within a pair of table tags. Upon loading the file, however, garbled text appears on the section of the page where the text should be. What could be the reason for this?

Consider three variables: someText = 'JavaScript1.2'; pattern = /(\w+)(\d)\.(\d)/i; outCome = pattern.exec(someText); What does pattern.global contain?