Created
February 4, 2019 16:16
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <title>Putting User Input into JS Objects</title> | |
| <style> | |
| .formBox{ | |
| padding: 0.5rem 2rem; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <form> | |
| <div class="formBox"> | |
| <label for="title">Movie</label> | |
| <input type="text" id="title" placeholder="Title"/> | |
| </div> | |
| <div class="formBox"> | |
| <label for="yr">Year</label> | |
| <input type="number" id="yr" placeholder="Year"/> | |
| </div> | |
| <div class="formBox"> | |
| <button id="btn">Click to Add</button> | |
| </div> | |
| <div id="msg"> | |
| <pre></pre> | |
| </div> | |
| </form> | |
| <script> | |
| let movies = []; | |
| // example {id:1592304983049, title: 'Deadpool', year: 2015} | |
| const addMovie = (ev)=>{ | |
| ev.preventDefault(); //to stop the form submitting | |
| let movie = { | |
| id: Date.now(), | |
| title: document.getElementById('title').value, | |
| year: document.getElementById('yr').value | |
| } | |
| movies.push(movie); | |
| document.forms[0].reset(); // to clear the form for the next entries | |
| //document.querySelector('form').reset(); | |
| //for display purposes only | |
| console.warn('added' , {movies} ); | |
| let pre = document.querySelector('#msg pre'); | |
| pre.textContent = '\n' + JSON.stringify(movies, '\t', 2); | |
| //saving to localStorage | |
| localStorage.setItem('MyMovieList', JSON.stringify(movies) ); | |
| } | |
| document.addEventListener('DOMContentLoaded', ()=>{ | |
| document.getElementById('btn').addEventListener('click', addMovie); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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Hello I'm getting the following error:
Uncaught TypeError: Cannot read properties of null (reading 'addEventListener') at HTMLDocument.<anonymous> (index.html:216:43) (anonymous) @ index.html:216