Uber Interview Question for Front-end Software Engineers


Country: United States
Interview Type: Phone Interview




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<div id="sample">Sample</div>
<script>
function addClass(id){
var elt = document.getElementById(id);
for(let i =1 ; i<arguments.length ; i++){
elt.classList.add(arguments[i]);
}}
addClass('sample' , 'sample','sample_1', 'x');
</script>

- Pradanya February 06, 2019 | Flag Reply
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You can achieve this by using below code

<div id="sample">Sample</div>
<script>
function addClass(id){
var elt = document.getElementById(id);
for(let i =1 ; i<arguments.length ; i++){
elt.classList.add(arguments[i]);
}}
addClass('sample' , 'sample','sample_1', 'x');
</script>
Here you are using arguments which is an Array-like object accessible inside functions that contains the values of the arguments passed to that function. And classList.add to add class and classList.remove to remove class.
The Element.classList is a read-only property that returns a live DOMTokenList collection of the class attributes of the element.
Using classList is a convenient alternative to accessing an element's list of classes as a space-delimited string via element.className.

- pradnyavetale February 06, 2019 | Flag Reply


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