this on a javascript function code example

Example 1: define function in javascript

/* Declare function */
function myFunc(param) {
  // Statements 
}

Example 2: javascript this

// In web browsers, the window object is also the global object:
console.log(this === window); // true

a = 37;
console.log(window.a); // 37

this.b = "MDN";
console.log(window.b)  // "MDN"
console.log(b)         // "MDN"