JavaScript Strict Mode

Hoisting a precess in which you can declare a variable after it used. In other words; a variable can be used before it has been declared.

Example of JavaScript Hoisting


A regular expression could be defined with the RegExp () constructor, as follows −

<p id="demo"></p>
x = 6; // Assign 5 to x

elem = document.getElementById("demo"); // Find an element
elem.innerHTML = x;                     // Display x in the element

var x; // Declare x


Output of above code

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