--- title: Work with Data in D3 --- # Work with Data in D3 --- ## Problem Explanation This challenge uses the `select`, `selectAll`, `append`, and `text` methods seen in previous challenges. It adds 2 new D3 methods: `data` and `enter` to target the given data and display an element on the page for each datum #### Relevant Links From the official D3 documentation: * [data](https://github.com/d3/d3-selection/blob/master/README.md#selection_data) * [enter](https://github.com/d3/d3-selection/blob/master/README.md#selection_enter) --- ## Hints ### Hint 1 * After selecting the correct HTML nodes, use the `data` method with the `dataset` variable passed as an argument to make the D3 object aware of the data ### Hint 2 * Use the `enter` method to ensure that your HTML document has enough elements of the type you specified in `selectAll` for each datum ### Hint 3 * Now that the D3 object is aware of your data and has created enough elements for each datum, `append` the elements of the specified type and add the `text` required in the instructions --- ## Solutions

Solution 1 (Click to Show/Hide)

```javascript ``` #### Code Explanation * `d3` targets the D3 object * `select('body')` is used to `select` the 'body' element of the HTML document * `selectAll('h2')` is used to `selectAll` of the 'h2' elements that are children to 'body' * `data(dataset)` calls the D3 `data` method and uses the given dataset as an argument * `enter()` uses the D3 `enter` method to check the current number of elements selected and create any missing ones according to the amount needed by the dataset * `append('h2')` takes these newly created elements from `enter` and ensures they are created as 'h2' elements * `text('New Title')` changes the text of every element selected to 'New Title' * The dataset contains 9 datum, so the final solution should show 9 'h2' elements with the text 'New Title'