JS-Selector-Test

The task is to create a JavaScript selection engine i.e. a JavaScript function that will return DOM elements given a CSS selector. The test contains 3 files:

Test.html contains the HTML your function will be tested on
Test.js contains a function which will provide results for your answer in the developer console
Answer.js contains a template function that you should change and submit once you have finished

Rules

1. You should only modify and submit Answer.js
1. You may not use any JavaScript libraries
1. document.querySelector/document.querySelectorAll may not be used

Running the test

Open Test.html in a web browser (IE8+, Chrome, Firefox or Safari) and check the developer console for the test results. The template Answer.js should show 1 of 7 tests passed (as one of the answers should be an empty array). The template looks like so:

var $ = function (selector) {
  var elements = [];
  ////////////////////
  // Your code here //
  ////////////////////
  return elements;
}

Answer.js will be tested on the body of Test.html:

<body>
  <div></div>
  <div id="some_id" class="some_class some_other_class"></div>
  <img id="some_other_id" class="some_class some_other_class"></img>
  <input type="text">
</body>

The following calls to your function will be made. Your function should return an array of DOM elements that match the CSS selector.

$("div") - Should return 2 DIVs
$("img.some_class") - Should return 1 IMG
$("#some_id") - Should return 1 DIV
$(".some_class") - Should return 1 DIV and 1 IMG
$("input#some_id") - Should return an empty array
$("div#some_id.some_class") - Should return 1 DIV
$("div.some_class#some_id") - Should return 1 DIV

Try to pass as many tests as possible, the number of tests passed and quality of written code in Answer.js will be considered.

sphaughton / JS-Selector-Test

JS-Selector-Test

Rules

Running the test

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