Question

Write a function called changeBGColor that changes the background color of all elements which has Class name "classColor".

Answer 1

function changeBGColor(){

// Selecting elemens by Class Name

bgElements = document.getElementsByClassName("classColor");

// When we use class name, A single element is not select instead a object is returned

// Hence we will be looping the element object.

var start;
for (start = 0; start < bgElements.length; start++) {

// Changing background color
bgElements[start].style.backgroundColor = "red";
}

}

Please let me know in the comments if any additions are needed.

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